Php 更新时未定义的变量
在这里，我的目标是用我在文本框中设置的标题更新一本书的信息。但是在我的代码中，当我运行时，我得到了错误，因为Php 更新时未定义的变量,php,Php,在这里，我的目标是用我在文本框中设置的标题更新一本书的信息。但是在我的代码中，当我运行时，我得到了错误，因为$query2在$query2['status']==“Available”中未定义。有人能纠正我的错误吗 <?php $user="root"; $server="localhost"; $password=""; $db="library book"; $query=mysql_connect($server,$user,$password); $dbRes = mysql_se
$query2$query2['status']==“Available”<?php
$user="root";
$server="localhost";
$password="";
$db="library book";
$query=mysql_connect($server,$user,$password);
$dbRes = mysql_select_db($db,$query);
if(isset($_GET['book_id']))
{
$bookid = $_GET['book_id'];
$str="select * from books where bookid=$bookid";
$query1=mysql_query($str);
//echo $query1;
$query2=mysql_fetch_array($query1);
//print_r ($query2);
}
if(isset($_POST['Update']))
{
$title=mysql_real_escape_string($_POST['title']);
$author=mysql_real_escape_string($_POST['author']);
$publisher=mysql_real_escape_string($_POST['publisher']);
$numcopies=mysql_real_escape_string($_POST['numcopies']);
$shelfno=mysql_real_escape_string($_POST['shelfno']);
$status=mysql_real_escape_string($_POST['status']);
$str1="update books set title=$title where bookid=$bookid";
$query3=mysql_query($str1);
echo $query3;
$query4=mysql_query("select * from books");
$row=mysql_fetch_array($query3);
echo "<table>";
echo "<tr><th>BookID</th><th>Title</th><th>Author</th><th>Publisher</th><th>numcopies</th><th>shelfno</th><th>status</th><th>Action</th></tr>";
echo "<tr>";
echo "<td>".$row['bookid']."</td>";
echo "<td>".$row['title']."</td>";
echo "<td>".$row['author']."</td>";
echo "<td>".$row['publisher']."</td>";
echo "<td>".$row['numcopies']."</td>";
echo "<td>".$row['shelfno']."</td>";
echo "<td>".$row['status']."</td>";
echo "</tr>";
echo "</table>";
if ($query2['status']=="Available")
echo "selected";
if ($query2['status']=="Unavailable")
echo "selected";
}
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo $query2['title'];?>">
<br/>
EnterAuthor:<input type="text" name="author" value="<?php echo $query2['author'];?>" >
<br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo $query2['publisher'];?>">
<br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo $query2['numcopies'];?>">
<br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo $query2['shelfno'];?>">
<br/>
<input type="hidden" name="bookid" value=<?php if(isset($bookid)) echo $bookid; ?>>
<select>
<option value="available" <?php if ($query2['status']=="Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if ($query2['status']=="Unavailable") echo "selected";?>>Unavailable</option>
</select>
<br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
编辑字段
身体{
背景色：rgb（255,0255）；
}
EntertTitle:我认为不幸的是，您在这里遇到的是一种综合症的开始，因此您需要投资学习PHP。你将有更少的机会出现安全问题，你的脚本将从一开始就更干净，更容易维护，等等
对于这个特定的代码段，除其他外，您有一些问题，您可以通过$\u GET
和$\u POST
设置bookid
，但是很难确定哪一个是最好的使用，在
标记上方会出现html，但您遇到的主要问题是，您的变量定义在if
范围内，但也引用在if
范围外，因此当if
条件不满足时，将产生错误（更多参考）
除了解决范围问题之外，还有一些建议：
使用带有参数绑定的PDO
或mysqli
。我的例子使用
在您的最终布局中使用或，同时考虑可用性和可读性（它看起来更复杂，正如我下面所说的，但只是因为它都粘贴在一个页面上。每个页面都应该是单独的）。所有这些$query
，$query1
，$query2
等等都让人感到困惑。我使用过函数，但是类最好在内部将bookid
传递给所有方法
标准化您的图书id键名称，使其成为book\u id
或book id
，而不是两者兼而有之。我的示例使用bookid
这可能有一些缺陷，但希望它能给您一些有用的想法，正如我之前所说的，作为一个类（实际上有几个类）实现这一点会更有用，但使用函数可能是帮助清理脚本的一个良好开端
重要提示：我没有测试过这个（虽然应该没有语法错误），但是通过将您的版本与这个版本并行，您应该能够了解正在发生的事情以及这些事情的用途。如果你不理解它，请先仔细阅读，不要盲目地复制和粘贴，否则你会遇到更多的麻烦。正如他们所说的，使用风险自负
/functions/getBooks.php
# Create a general function to fetch all books.
function getBooks($con)
{
$result = array();
$query = $con->prepare("SELECT * FROM books");
$query->execute();
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row;
}
return $result;
}
# Create a function to fetch a specific book by id
function getBookById($id,$con)
{
$query = $con->prepare("SELECT * FROM books WHERE bookid = :id");
$query->execute(array(":id"=>$id));
$row = $query->fetch(PDO::FETCH_ASSOC);
return (!empty($row))? $row : array();
}
# This should fetch from a global request, that way you can tell if
# a book is currently being accessed
function getBook($con)
{
autoload(array('getBookById','getId'));
$id = getId('req');
if(empty($id))
return false;
return getBookById($id,$con);
}
# Create an update function that can be accessed at anytime. Use binding
# so you don't need to mess with any sort of escaping
function updateBookById($id,$values,$con)
{
foreach($values as $keys => $vals) {
$bKey = ":{$keys}";
$bind[$bKey] = $vals;
$sql[] = '`'.$key.'` = '.$bKey;
}
$bind[":id"] = $id;
$query = $con->prepare("UPDATE books SET ".implode(', ',$sql)." WHERE bookid = :id");
$query->execute($bind);
}
# This is is just a specific function to focus on title. Not sure you need
# it since the update book by id function would do the same thing
function updateBookTitle($id,$title,$con)
{
$bind[":id"] = $id;
$bind[":title"] = $title;
$query = $con->prepare("UPDATE books SET title = :title WHERE bookid = :id");
$query->execute($bind);
}
# This will fetch the id value from a global
function getId($type = false)
{
switch($type) {
case('post'):
return (isset($_POST['bookid']))? $_POST['bookid'] : false;
case('req'):
return (isset($_REQUEST['bookid']))? $_REQUEST['bookid'] : false;
default:
return (isset($_GET['bookid']))? $_GET['bookid'] : false;
}
}
# This will sit and just wait for the right globals activate it
function bookObserver($con,&$curr)
{
autoload('getId');
if(getId('req')) {
autoload('getBookById');
$books = getBookById(getId('req'),$con);
if(!empty($books))
$curr = $books;
if(isset($_POST['Update'])) {
$values = array(
'title' => $_POST['title'],
'author' => $_POST['author'],
'publisher' => $_POST['publisher'],
'numcopies' => $_POST['numcopies'],
'shelfno' => $_POST['shelfno'],
'status' => $_POST['status']
);
autoload('updateBookById');
updateBookById(getId('req'),$values,$con);
}
}
}
# This sits and waits for the update to write the table to the page
function bookListObserver($current,$con)
{
if(isset($_POST['Update'])) {
autoload('bookList');
echo bookList(((!empty($current['status']))? $current['status'] : false),$con);
}
}
# This will just check if a value is set. Saves on scripting
function getValue($array,$key,$def = false)
{
return (!empty($array[$key]))? $array[$key] : $def;
}
# Displays your book list. Currently you are only showing the last book,
# which doesn't appear correct. No point in getting all books but only showing
# the last one
function bookList($selected = false,$con)
{
autoload('getBooks');
$books = getBooks($con);
ob_start();
?>
<table>
<tr>
<th>BookID</th>
<th>Title</th>
<th>Author</th>
<th>Publisher</th>
<th>numcopies</th>
<th>shelfno</th>
<th>status</th>
<th>Action</th>
</tr>
<?php foreach($books as $row) { ?>
<tr>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo $row['publisher'] ?></td>
<td><?php echo $row['numcopies'] ?></td>
<td><?php echo $row['shelfno'] ?></td>
<td><?php echo $row['status'] ?></td>
</tr>
<?php } ?>
</table>
<?php
if($selected == "Available")
echo "selected";
elseif($selected == "Unavailable")
echo "selected";
$data = ob_get_contents();
ob_end_clean();
return $data;
}
# This is your mysql connection, it requires attention to build out
# It's not as useful as it could be, so you will want to research it
function connect()
{
return new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
}
# This is just a handy function to autoload functions when you want
# to use them. If you used classes, you would make an spl_autoload_register()
# function or install something like Composer to autoload
function autoload($name,$run = false)
{
if(is_array($name)) {
foreach($name as $func) {
autoload($func);
}
return;
}
if(!function_exists($name)) {
if(is_file($file = FUNCTIONS.DS.$name.'.php'))
include_once($file);
}
if($run) {
if(function_exists($name))
return $name();
}
}
# Make sure errors are on in testing
ini_set('display_errors',1);
error_reporting(E_ALL);
# Creating commonly-used defines will help your scripts be
# more reliable and consistent
define('DS',DIRECTORY_SEPARATOR);
define('ROOT_DIR',__DIR__);
define('FUNCTIONS',ROOT_DIR.DS.'functions');
define('DB_HOST','localhost');
define('DB_NAME','library book');
define('DB_USER','root');
define('DB_PASS','');
# Start session by default
session_start();
require_once(FUNCTIONS.DS.'autoload.php');
# Autoload the connect function and assign it
$con = autoload('connect',true);
<?php
# Add config
include(__DIR__.DIRECTORY_SEPARATOR.'config.php');
# Include all our starting page functions
autoload(array('bookObserver','bookListObserver','getBook', 'getValue'));
# Set default array for current selection
$current = array();
# Start observer, pass connection
bookObserver($con,$current);
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<?php
# This writes the table if update is set
# You should not put this html above the <html> tag
bookListObserver($current,$con);
# This gets the book from the page request
$book = getBook($con);
?>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo getValue($book,'title') ?>"><br/>
EnterAuthor:<input type="text" name="author" value="<?php echo getValue($book,'author') ?>" ><br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo getValue($book,'publisher') ?>"><br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo getValue($book,'numcopies') ?>"><br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo getValue($book,'shelfno') ?>"><br/>
<input type="hidden" name="bookid" value="<?php echo getValue($book,'bookid') ?>" />
<select>
<option value="available" <?php if(isset($current['status']) && $current['status'] == "Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if (isset($current['status']) && $current['status'] == "Unavailable") echo "selected";?>>Unavailable</option>
</select><br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
/functions/getBookById.php
# Create a general function to fetch all books.
function getBooks($con)
{
$result = array();
$query = $con->prepare("SELECT * FROM books");
$query->execute();
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row;
}
return $result;
}
# Create a function to fetch a specific book by id
function getBookById($id,$con)
{
$query = $con->prepare("SELECT * FROM books WHERE bookid = :id");
$query->execute(array(":id"=>$id));
$row = $query->fetch(PDO::FETCH_ASSOC);
return (!empty($row))? $row : array();
}
# This should fetch from a global request, that way you can tell if
# a book is currently being accessed
function getBook($con)
{
autoload(array('getBookById','getId'));
$id = getId('req');
if(empty($id))
return false;
return getBookById($id,$con);
}
# Create an update function that can be accessed at anytime. Use binding
# so you don't need to mess with any sort of escaping
function updateBookById($id,$values,$con)
{
foreach($values as $keys => $vals) {
$bKey = ":{$keys}";
$bind[$bKey] = $vals;
$sql[] = '`'.$key.'` = '.$bKey;
}
$bind[":id"] = $id;
$query = $con->prepare("UPDATE books SET ".implode(', ',$sql)." WHERE bookid = :id");
$query->execute($bind);
}
# This is is just a specific function to focus on title. Not sure you need
# it since the update book by id function would do the same thing
function updateBookTitle($id,$title,$con)
{
$bind[":id"] = $id;
$bind[":title"] = $title;
$query = $con->prepare("UPDATE books SET title = :title WHERE bookid = :id");
$query->execute($bind);
}
# This will fetch the id value from a global
function getId($type = false)
{
switch($type) {
case('post'):
return (isset($_POST['bookid']))? $_POST['bookid'] : false;
case('req'):
return (isset($_REQUEST['bookid']))? $_REQUEST['bookid'] : false;
default:
return (isset($_GET['bookid']))? $_GET['bookid'] : false;
}
}
# This will sit and just wait for the right globals activate it
function bookObserver($con,&$curr)
{
autoload('getId');
if(getId('req')) {
autoload('getBookById');
$books = getBookById(getId('req'),$con);
if(!empty($books))
$curr = $books;
if(isset($_POST['Update'])) {
$values = array(
'title' => $_POST['title'],
'author' => $_POST['author'],
'publisher' => $_POST['publisher'],
'numcopies' => $_POST['numcopies'],
'shelfno' => $_POST['shelfno'],
'status' => $_POST['status']
);
autoload('updateBookById');
updateBookById(getId('req'),$values,$con);
}
}
}
# This sits and waits for the update to write the table to the page
function bookListObserver($current,$con)
{
if(isset($_POST['Update'])) {
autoload('bookList');
echo bookList(((!empty($current['status']))? $current['status'] : false),$con);
}
}
# This will just check if a value is set. Saves on scripting
function getValue($array,$key,$def = false)
{
return (!empty($array[$key]))? $array[$key] : $def;
}
# Displays your book list. Currently you are only showing the last book,
# which doesn't appear correct. No point in getting all books but only showing
# the last one
function bookList($selected = false,$con)
{
autoload('getBooks');
$books = getBooks($con);
ob_start();
?>
<table>
<tr>
<th>BookID</th>
<th>Title</th>
<th>Author</th>
<th>Publisher</th>
<th>numcopies</th>
<th>shelfno</th>
<th>status</th>
<th>Action</th>
</tr>
<?php foreach($books as $row) { ?>
<tr>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo $row['publisher'] ?></td>
<td><?php echo $row['numcopies'] ?></td>
<td><?php echo $row['shelfno'] ?></td>
<td><?php echo $row['status'] ?></td>
</tr>
<?php } ?>
</table>
<?php
if($selected == "Available")
echo "selected";
elseif($selected == "Unavailable")
echo "selected";
$data = ob_get_contents();
ob_end_clean();
return $data;
}
# This is your mysql connection, it requires attention to build out
# It's not as useful as it could be, so you will want to research it
function connect()
{
return new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
}
# This is just a handy function to autoload functions when you want
# to use them. If you used classes, you would make an spl_autoload_register()
# function or install something like Composer to autoload
function autoload($name,$run = false)
{
if(is_array($name)) {
foreach($name as $func) {
autoload($func);
}
return;
}
if(!function_exists($name)) {
if(is_file($file = FUNCTIONS.DS.$name.'.php'))
include_once($file);
}
if($run) {
if(function_exists($name))
return $name();
}
}
# Make sure errors are on in testing
ini_set('display_errors',1);
error_reporting(E_ALL);
# Creating commonly-used defines will help your scripts be
# more reliable and consistent
define('DS',DIRECTORY_SEPARATOR);
define('ROOT_DIR',__DIR__);
define('FUNCTIONS',ROOT_DIR.DS.'functions');
define('DB_HOST','localhost');
define('DB_NAME','library book');
define('DB_USER','root');
define('DB_PASS','');
# Start session by default
session_start();
require_once(FUNCTIONS.DS.'autoload.php');
# Autoload the connect function and assign it
$con = autoload('connect',true);
<?php
# Add config
include(__DIR__.DIRECTORY_SEPARATOR.'config.php');
# Include all our starting page functions
autoload(array('bookObserver','bookListObserver','getBook', 'getValue'));
# Set default array for current selection
$current = array();
# Start observer, pass connection
bookObserver($con,$current);
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<?php
# This writes the table if update is set
# You should not put this html above the <html> tag
bookListObserver($current,$con);
# This gets the book from the page request
$book = getBook($con);
?>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo getValue($book,'title') ?>"><br/>
EnterAuthor:<input type="text" name="author" value="<?php echo getValue($book,'author') ?>" ><br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo getValue($book,'publisher') ?>"><br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo getValue($book,'numcopies') ?>"><br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo getValue($book,'shelfno') ?>"><br/>
<input type="hidden" name="bookid" value="<?php echo getValue($book,'bookid') ?>" />
<select>
<option value="available" <?php if(isset($current['status']) && $current['status'] == "Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if (isset($current['status']) && $current['status'] == "Unavailable") echo "selected";?>>Unavailable</option>
</select><br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
/functions/getBook.php
# Create a general function to fetch all books.
function getBooks($con)
{
$result = array();
$query = $con->prepare("SELECT * FROM books");
$query->execute();
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row;
}
return $result;
}
# Create a function to fetch a specific book by id
function getBookById($id,$con)
{
$query = $con->prepare("SELECT * FROM books WHERE bookid = :id");
$query->execute(array(":id"=>$id));
$row = $query->fetch(PDO::FETCH_ASSOC);
return (!empty($row))? $row : array();
}
# This should fetch from a global request, that way you can tell if
# a book is currently being accessed
function getBook($con)
{
autoload(array('getBookById','getId'));
$id = getId('req');
if(empty($id))
return false;
return getBookById($id,$con);
}
# Create an update function that can be accessed at anytime. Use binding
# so you don't need to mess with any sort of escaping
function updateBookById($id,$values,$con)
{
foreach($values as $keys => $vals) {
$bKey = ":{$keys}";
$bind[$bKey] = $vals;
$sql[] = '`'.$key.'` = '.$bKey;
}
$bind[":id"] = $id;
$query = $con->prepare("UPDATE books SET ".implode(', ',$sql)." WHERE bookid = :id");
$query->execute($bind);
}
# This is is just a specific function to focus on title. Not sure you need
# it since the update book by id function would do the same thing
function updateBookTitle($id,$title,$con)
{
$bind[":id"] = $id;
$bind[":title"] = $title;
$query = $con->prepare("UPDATE books SET title = :title WHERE bookid = :id");
$query->execute($bind);
}
# This will fetch the id value from a global
function getId($type = false)
{
switch($type) {
case('post'):
return (isset($_POST['bookid']))? $_POST['bookid'] : false;
case('req'):
return (isset($_REQUEST['bookid']))? $_REQUEST['bookid'] : false;
default:
return (isset($_GET['bookid']))? $_GET['bookid'] : false;
}
}
# This will sit and just wait for the right globals activate it
function bookObserver($con,&$curr)
{
autoload('getId');
if(getId('req')) {
autoload('getBookById');
$books = getBookById(getId('req'),$con);
if(!empty($books))
$curr = $books;
if(isset($_POST['Update'])) {
$values = array(
'title' => $_POST['title'],
'author' => $_POST['author'],
'publisher' => $_POST['publisher'],
'numcopies' => $_POST['numcopies'],
'shelfno' => $_POST['shelfno'],
'status' => $_POST['status']
);
autoload('updateBookById');
updateBookById(getId('req'),$values,$con);
}
}
}
# This sits and waits for the update to write the table to the page
function bookListObserver($current,$con)
{
if(isset($_POST['Update'])) {
autoload('bookList');
echo bookList(((!empty($current['status']))? $current['status'] : false),$con);
}
}
# This will just check if a value is set. Saves on scripting
function getValue($array,$key,$def = false)
{
return (!empty($array[$key]))? $array[$key] : $def;
}
# Displays your book list. Currently you are only showing the last book,
# which doesn't appear correct. No point in getting all books but only showing
# the last one
function bookList($selected = false,$con)
{
autoload('getBooks');
$books = getBooks($con);
ob_start();
?>
<table>
<tr>
<th>BookID</th>
<th>Title</th>
<th>Author</th>
<th>Publisher</th>
<th>numcopies</th>
<th>shelfno</th>
<th>status</th>
<th>Action</th>
</tr>
<?php foreach($books as $row) { ?>
<tr>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo $row['publisher'] ?></td>
<td><?php echo $row['numcopies'] ?></td>
<td><?php echo $row['shelfno'] ?></td>
<td><?php echo $row['status'] ?></td>
</tr>
<?php } ?>
</table>
<?php
if($selected == "Available")
echo "selected";
elseif($selected == "Unavailable")
echo "selected";
$data = ob_get_contents();
ob_end_clean();
return $data;
}
# This is your mysql connection, it requires attention to build out
# It's not as useful as it could be, so you will want to research it
function connect()
{
return new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
}
# This is just a handy function to autoload functions when you want
# to use them. If you used classes, you would make an spl_autoload_register()
# function or install something like Composer to autoload
function autoload($name,$run = false)
{
if(is_array($name)) {
foreach($name as $func) {
autoload($func);
}
return;
}
if(!function_exists($name)) {
if(is_file($file = FUNCTIONS.DS.$name.'.php'))
include_once($file);
}
if($run) {
if(function_exists($name))
return $name();
}
}
# Make sure errors are on in testing
ini_set('display_errors',1);
error_reporting(E_ALL);
# Creating commonly-used defines will help your scripts be
# more reliable and consistent
define('DS',DIRECTORY_SEPARATOR);
define('ROOT_DIR',__DIR__);
define('FUNCTIONS',ROOT_DIR.DS.'functions');
define('DB_HOST','localhost');
define('DB_NAME','library book');
define('DB_USER','root');
define('DB_PASS','');
# Start session by default
session_start();
require_once(FUNCTIONS.DS.'autoload.php');
# Autoload the connect function and assign it
$con = autoload('connect',true);
<?php
# Add config
include(__DIR__.DIRECTORY_SEPARATOR.'config.php');
# Include all our starting page functions
autoload(array('bookObserver','bookListObserver','getBook', 'getValue'));
# Set default array for current selection
$current = array();
# Start observer, pass connection
bookObserver($con,$current);
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<?php
# This writes the table if update is set
# You should not put this html above the <html> tag
bookListObserver($current,$con);
# This gets the book from the page request
$book = getBook($con);
?>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo getValue($book,'title') ?>"><br/>
EnterAuthor:<input type="text" name="author" value="<?php echo getValue($book,'author') ?>" ><br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo getValue($book,'publisher') ?>"><br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo getValue($book,'numcopies') ?>"><br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo getValue($book,'shelfno') ?>"><br/>
<input type="hidden" name="bookid" value="<?php echo getValue($book,'bookid') ?>" />
<select>
<option value="available" <?php if(isset($current['status']) && $current['status'] == "Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if (isset($current['status']) && $current['status'] == "Unavailable") echo "selected";?>>Unavailable</option>
</select><br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
/functions/updateBookById.php
# Create a general function to fetch all books.
function getBooks($con)
{
$result = array();
$query = $con->prepare("SELECT * FROM books");
$query->execute();
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row;
}
return $result;
}
# Create a function to fetch a specific book by id
function getBookById($id,$con)
{
$query = $con->prepare("SELECT * FROM books WHERE bookid = :id");
$query->execute(array(":id"=>$id));
$row = $query->fetch(PDO::FETCH_ASSOC);
return (!empty($row))? $row : array();
}
# This should fetch from a global request, that way you can tell if
# a book is currently being accessed
function getBook($con)
{
autoload(array('getBookById','getId'));
$id = getId('req');
if(empty($id))
return false;
return getBookById($id,$con);
}
# Create an update function that can be accessed at anytime. Use binding
# so you don't need to mess with any sort of escaping
function updateBookById($id,$values,$con)
{
foreach($values as $keys => $vals) {
$bKey = ":{$keys}";
$bind[$bKey] = $vals;
$sql[] = '`'.$key.'` = '.$bKey;
}
$bind[":id"] = $id;
$query = $con->prepare("UPDATE books SET ".implode(', ',$sql)." WHERE bookid = :id");
$query->execute($bind);
}
# This is is just a specific function to focus on title. Not sure you need
# it since the update book by id function would do the same thing
function updateBookTitle($id,$title,$con)
{
$bind[":id"] = $id;
$bind[":title"] = $title;
$query = $con->prepare("UPDATE books SET title = :title WHERE bookid = :id");
$query->execute($bind);
}
# This will fetch the id value from a global
function getId($type = false)
{
switch($type) {
case('post'):
return (isset($_POST['bookid']))? $_POST['bookid'] : false;
case('req'):
return (isset($_REQUEST['bookid']))? $_REQUEST['bookid'] : false;
default:
return (isset($_GET['bookid']))? $_GET['bookid'] : false;
}
}
# This will sit and just wait for the right globals activate it
function bookObserver($con,&$curr)
{
autoload('getId');
if(getId('req')) {
autoload('getBookById');
$books = getBookById(getId('req'),$con);
if(!empty($books))
$curr = $books;
if(isset($_POST['Update'])) {
$values = array(
'title' => $_POST['title'],
'author' => $_POST['author'],
'publisher' => $_POST['publisher'],
'numcopies' => $_POST['numcopies'],
'shelfno' => $_POST['shelfno'],
'status' => $_POST['status']
);
autoload('updateBookById');
updateBookById(getId('req'),$values,$con);
}
}
}
# This sits and waits for the update to write the table to the page
function bookListObserver($current,$con)
{
if(isset($_POST['Update'])) {
autoload('bookList');
echo bookList(((!empty($current['status']))? $current['status'] : false),$con);
}
}
# This will just check if a value is set. Saves on scripting
function getValue($array,$key,$def = false)
{
return (!empty($array[$key]))? $array[$key] : $def;
}
# Displays your book list. Currently you are only showing the last book,
# which doesn't appear correct. No point in getting all books but only showing
# the last one
function bookList($selected = false,$con)
{
autoload('getBooks');
$books = getBooks($con);
ob_start();
?>
<table>
<tr>
<th>BookID</th>
<th>Title</th>
<th>Author</th>
<th>Publisher</th>
<th>numcopies</th>
<th>shelfno</th>
<th>status</th>
<th>Action</th>
</tr>
<?php foreach($books as $row) { ?>
<tr>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo $row['publisher'] ?></td>
<td><?php echo $row['numcopies'] ?></td>
<td><?php echo $row['shelfno'] ?></td>
<td><?php echo $row['status'] ?></td>
</tr>
<?php } ?>
</table>
<?php
if($selected == "Available")
echo "selected";
elseif($selected == "Unavailable")
echo "selected";
$data = ob_get_contents();
ob_end_clean();
return $data;
}
# This is your mysql connection, it requires attention to build out
# It's not as useful as it could be, so you will want to research it
function connect()
{
return new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
}
# This is just a handy function to autoload functions when you want
# to use them. If you used classes, you would make an spl_autoload_register()
# function or install something like Composer to autoload
function autoload($name,$run = false)
{
if(is_array($name)) {
foreach($name as $func) {
autoload($func);
}
return;
}
if(!function_exists($name)) {
if(is_file($file = FUNCTIONS.DS.$name.'.php'))
include_once($file);
}
if($run) {
if(function_exists($name))
return $name();
}
}
# Make sure errors are on in testing
ini_set('display_errors',1);
error_reporting(E_ALL);
# Creating commonly-used defines will help your scripts be
# more reliable and consistent
define('DS',DIRECTORY_SEPARATOR);
define('ROOT_DIR',__DIR__);
define('FUNCTIONS',ROOT_DIR.DS.'functions');
define('DB_HOST','localhost');
define('DB_NAME','library book');
define('DB_USER','root');
define('DB_PASS','');
# Start session by default
session_start();
require_once(FUNCTIONS.DS.'autoload.php');
# Autoload the connect function and assign it
$con = autoload('connect',true);
<?php
# Add config
include(__DIR__.DIRECTORY_SEPARATOR.'config.php');
# Include all our starting page functions
autoload(array('bookObserver','bookListObserver','getBook', 'getValue'));
# Set default array for current selection
$current = array();
# Start observer, pass connection
bookObserver($con,$current);
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<?php
# This writes the table if update is set
# You should not put this html above the <html> tag
bookListObserver($current,$con);
# This gets the book from the page request
$book = getBook($con);
?>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo getValue($book,'title') ?>"><br/>
EnterAuthor:<input type="text" name="author" value="<?php echo getValue($book,'author') ?>" ><br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo getValue($book,'publisher') ?>"><br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo getValue($book,'numcopies') ?>"><br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo getValue($book,'shelfno') ?>"><br/>
<input type="hidden" name="bookid" value="<?php echo getValue($book,'bookid') ?>" />
<select>
<option value="available" <?php if(isset($current['status']) && $current['status'] == "Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if (isset($current['status']) && $current['status'] == "Unavailable") echo "selected";?>>Unavailable</option>
</select><br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
/functions/updateBookTitle.php
# Create a general function to fetch all books.
function getBooks($con)
{
$result = array();
$query = $con->prepare("SELECT * FROM books");
$query->execute();
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row;
}
return $result;
}
# Create a function to fetch a specific book by id
function getBookById($id,$con)
{
$query = $con->prepare("SELECT * FROM books WHERE bookid = :id");
$query->execute(array(":id"=>$id));
$row = $query->fetch(PDO::FETCH_ASSOC);
return (!empty($row))? $row : array();
}
# This should fetch from a global request, that way you can tell if
# a book is currently being accessed
function getBook($con)
{
autoload(array('getBookById','getId'));
$id = getId('req');
if(empty($id))
return false;
return getBookById($id,$con);
}
# Create an update function that can be accessed at anytime. Use binding
# so you don't need to mess with any sort of escaping
function updateBookById($id,$values,$con)
{
foreach($values as $keys => $vals) {
$bKey = ":{$keys}";
$bind[$bKey] = $vals;
$sql[] = '`'.$key.'` = '.$bKey;
}
$bind[":id"] = $id;
$query = $con->prepare("UPDATE books SET ".implode(', ',$sql)." WHERE bookid = :id");
$query->execute($bind);
}
# This is is just a specific function to focus on title. Not sure you need
# it since the update book by id function would do the same thing
function updateBookTitle($id,$title,$con)
{
$bind[":id"] = $id;
$bind[":title"] = $title;
$query = $con->prepare("UPDATE books SET title = :title WHERE bookid = :id");
$query->execute($bind);
}
# This will fetch the id value from a global
function getId($type = false)
{
switch($type) {
case('post'):
return (isset($_POST['bookid']))? $_POST['bookid'] : false;
case('req'):
return (isset($_REQUEST['bookid']))? $_REQUEST['bookid'] : false;
default:
return (isset($_GET['bookid']))? $_GET['bookid'] : false;
}
}
# This will sit and just wait for the right globals activate it
function bookObserver($con,&$curr)
{
autoload('getId');
if(getId('req')) {
autoload('getBookById');
$books = getBookById(getId('req'),$con);
if(!empty($books))
$curr = $books;
if(isset($_POST['Update'])) {
$values = array(
'title' => $_POST['title'],
'author' => $_POST['author'],
'publisher' => $_POST['publisher'],
'numcopies' => $_POST['numcopies'],
'shelfno' => $_POST['shelfno'],
'status' => $_POST['status']
);
autoload('updateBookById');
updateBookById(getId('req'),$values,$con);
}
}
}
# This sits and waits for the update to write the table to the page
function bookListObserver($current,$con)
{
if(isset($_POST['Update'])) {
autoload('bookList');
echo bookList(((!empty($current['status']))? $current['status'] : false),$con);
}
}
# This will just check if a value is set. Saves on scripting
function getValue($array,$key,$def = false)
{
return (!empty($array[$key]))? $array[$key] : $def;
}
# Displays your book list. Currently you are only showing the last book,
# which doesn't appear correct. No point in getting all books but only showing
# the last one
function bookList($selected = false,$con)
{
autoload('getBooks');
$books = getBooks($con);
ob_start();
?>
<table>
<tr>
<th>BookID</th>
<th>Title</th>
<th>Author</th>
<th>Publisher</th>
<th>numcopies</th>
<th>shelfno</th>
<th>status</th>
<th>Action</th>
</tr>
<?php foreach($books as $row) { ?>
<tr>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo $row['publisher'] ?></td>
<td><?php echo $row['numcopies'] ?></td>
<td><?php echo $row['shelfno'] ?></td>
<td><?php echo $row['status'] ?></td>
</tr>
<?php } ?>
</table>
<?php
if($selected == "Available")
echo "selected";
elseif($selected == "Unavailable")
echo "selected";
$data = ob_get_contents();
ob_end_clean();
return $data;
}
# This is your mysql connection, it requires attention to build out
# It's not as useful as it could be, so you will want to research it
function connect()
{
return new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
}
# This is just a handy function to autoload functions when you want
# to use them. If you used classes, you would make an spl_autoload_register()
# function or install something like Composer to autoload
function autoload($name,$run = false)
{
if(is_array($name)) {
foreach($name as $func) {
autoload($func);
}
return;
}
if(!function_exists($name)) {
if(is_file($file = FUNCTIONS.DS.$name.'.php'))
include_once($file);
}
if($run) {
if(function_exists($name))
return $name();
}
}
# Make sure errors are on in testing
ini_set('display_errors',1);
error_reporting(E_ALL);
# Creating commonly-used defines will help your scripts be
# more reliable and consistent
define('DS',DIRECTORY_SEPARATOR);
define('ROOT_DIR',__DIR__);
define('FUNCTIONS',ROOT_DIR.DS.'functions');
define('DB_HOST','localhost');
define('DB_NAME','library book');
define('DB_USER','root');
define('DB_PASS','');
# Start session by default
session_start();
require_once(FUNCTIONS.DS.'autoload.php');
# Autoload the connect function and assign it
$con = autoload('connect',true);
<?php
# Add config
include(__DIR__.DIRECTORY_SEPARATOR.'config.php');
# Include all our starting page functions
autoload(array('bookObserver','bookListObserver','getBook', 'getValue'));
# Set default array for current selection
$current = array();
# Start observer, pass connection
bookObserver($con,$current);
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<?php
# This writes the table if update is set
# You should not put this html above the <html> tag
bookListObserver($current,$con);
# This gets the book from the page request
$book = getBook($con);
?>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo getValue($book,'title') ?>"><br/>
EnterAuthor:<input type="text" name="author" value="<?php echo getValue($book,'author') ?>" ><br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo getValue($book,'publisher') ?>"><br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo getValue($book,'numcopies') ?>"><br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo getValue($book,'shelfno') ?>"><br/>
<input type="hidden" name="bookid" value="<?php echo getValue($book,'bookid') ?>" />
<select>
<option value="available" <?php if(isset($current['status']) && $current['status'] == "Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if (isset($current['status']) && $current['status'] == "Unavailable") echo "selected";?>>Unavailable</option>
</select><br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
/functions/getId.php
# Create a general function to fetch all books.
function getBooks($con)
{
$result = array();
$query = $con->prepare("SELECT * FROM books");
$query->execute();
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row;
}
return $result;
}
# Create a function to fetch a specific book by id
function getBookById($id,$con)
{
$query = $con->prepare("SELECT * FROM books WHERE bookid = :id");
$query->execute(array(":id"=>$id));
$row = $query->fetch(PDO::FETCH_ASSOC);
return (!empty($row))? $row : array();
}
# This should fetch from a global request, that way you can tell if
# a book is currently being accessed
function getBook($con)
{
autoload(array('getBookById','getId'));
$id = getId('req');
if(empty($id))
return false;
return getBookById($id,$con);
}
# Create an update function that can be accessed at anytime. Use binding
# so you don't need to mess with any sort of escaping
function updateBookById($id,$values,$con)
{
foreach($values as $keys => $vals) {
$bKey = ":{$keys}";
$bind[$bKey] = $vals;
$sql[] = '`'.$key.'` = '.$bKey;
}
$bind[":id"] = $id;
$query = $con->prepare("UPDATE books SET ".implode(', ',$sql)." WHERE bookid = :id");
$query->execute($bind);
}
# This is is just a specific function to focus on title. Not sure you need
# it since the update book by id function would do the same thing
function updateBookTitle($id,$title,$con)
{
$bind[":id"] = $id;
$bind[":title"] = $title;
$query = $con->prepare("UPDATE books SET title = :title WHERE bookid = :id");
$query->execute($bind);
}
# This will fetch the id value from a global
function getId($type = false)
{
switch($type) {
case('post'):
return (isset($_POST['bookid']))? $_POST['bookid'] : false;
case('req'):
return (isset($_REQUEST['bookid']))? $_REQUEST['bookid'] : false;
default:
return (isset($_GET['bookid']))? $_GET['bookid'] : false;
}
}
# This will sit and just wait for the right globals activate it
function bookObserver($con,&$curr)
{
autoload('getId');
if(getId('req')) {
autoload('getBookById');
$books = getBookById(getId('req'),$con);
if(!empty($books))
$curr = $books;
if(isset($_POST['Update'])) {
$values = array(
'title' => $_POST['title'],
'author' => $_POST['author'],
'publisher' => $_POST['publisher'],
'numcopies' => $_POST['numcopies'],
'shelfno' => $_POST['shelfno'],
'status' => $_POST['status']
);
autoload('updateBookById');
updateBookById(getId('req'),$values,$con);
}
}
}
# This sits and waits for the update to write the table to the page
function bookListObserver($current,$con)
{
if(isset($_POST['Update'])) {
autoload('bookList');
echo bookList(((!empty($current['status']))? $current['status'] : false),$con);
}
}
# This will just check if a value is set. Saves on scripting
function getValue($array,$key,$def = false)
{
return (!empty($array[$key]))? $array[$key] : $def;
}
# Displays your book list. Currently you are only showing the last book,
# which doesn't appear correct. No point in getting all books but only showing
# the last one
function bookList($selected = false,$con)
{
autoload('getBooks');
$books = getBooks($con);
ob_start();
?>
<table>
<tr>
<th>BookID</th>
<th>Title</th>
<th>Author</th>
<th>Publisher</th>
<th>numcopies</th>
<th>shelfno</th>
<th>status</th>
<th>Action</th>
</tr>
<?php foreach($books as $row) { ?>
<tr>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo $row['publisher'] ?></td>
<td><?php echo $row['numcopies'] ?></td>
<td><?php echo $row['shelfno'] ?></td>
<td><?php echo $row['status'] ?></td>
</tr>
<?php } ?>
</table>
<?php
if($selected == "Available")
echo "selected";
elseif($selected == "Unavailable")
echo "selected";
$data = ob_get_contents();
ob_end_clean();
return $data;
}
# This is your mysql connection, it requires attention to build out
# It's not as useful as it could be, so you will want to research it
function connect()
{
return new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
}
# This is just a handy function to autoload functions when you want
# to use them. If you used classes, you would make an spl_autoload_register()
# function or install something like Composer to autoload
function autoload($name,$run = false)
{
if(is_array($name)) {
foreach($name as $func) {
autoload($func);
}
return;
}
if(!function_exists($name)) {
if(is_file($file = FUNCTIONS.DS.$name.'.php'))
include_once($file);
}
if($run) {
if(function_exists($name))
return $name();
}
}
# Make sure errors are on in testing
ini_set('display_errors',1);
error_reporting(E_ALL);
# Creating commonly-used defines will help your scripts be
# more reliable and consistent
define('DS',DIRECTORY_SEPARATOR);
define('ROOT_DIR',__DIR__);
define('FUNCTIONS',ROOT_DIR.DS.'functions');
define('DB_HOST','localhost');
define('DB_NAME','library book');
define('DB_USER','root');
define('DB_PASS','');
# Start session by default
session_start();
require_once(FUNCTIONS.DS.'autoload.php');
# Autoload the connect function and assign it
$con = autoload('connect',true);
<?php
# Add config
include(__DIR__.DIRECTORY_SEPARATOR.'config.php');
# Include all our starting page functions
autoload(array('bookObserver','bookListObserver','getBook', 'getValue'));
# Set default array for current selection
$current = array();
# Start observer, pass connection
bookObserver($con,$current);
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<?php
# This writes the table if update is set
# You should not put this html above the <html> tag
bookListObserver($current,$con);
# This gets the book from the page request
$book = getBook($con);
?>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo getValue($book,'title') ?>"><br/>
EnterAuthor:<input type="text" name="author" value="<?php echo getValue($book,'author') ?>" ><br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo getValue($book,'publisher') ?>"><br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo getValue($book,'numcopies') ?>"><br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo getValue($book,'shelfno') ?>"><br/>
<input type="hidden" name="bookid" value="<?php echo getValue($book,'bookid') ?>" />
<select>
<option value="available" <?php if(isset($current['status']) && $current['status'] == "Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if (isset($current['status']) && $current['status'] == "Unavailable") echo "selected";?>>Unavailable</option>
</select><br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
/functions/bookObserver.php
# Create a general function to fetch all books.
function getBooks($con)
{
$result = array();
$query = $con->prepare("SELECT * FROM books");
$query->execute();
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row;
}
return $result;
}
# Create a function to fetch a specific book by id
function getBookById($id,$con)
{
$query = $con->prepare("SELECT * FROM books WHERE bookid = :id");
$query->execute(array(":id"=>$id));
$row = $query->fetch(PDO::FETCH_ASSOC);
return (!empty($row))? $row : array();
}
# This should fetch from a global request, that way you can tell if
# a book is currently being accessed
function getBook($con)
{
autoload(array('getBookById','getId'));
$id = getId('req');
if(empty($id))
return false;
return getBookById($id,$con);
}
# Create an update function that can be accessed at anytime. Use binding
# so you don't need to mess with any sort of escaping
function updateBookById($id,$values,$con)
{
foreach($values as $keys => $vals) {
$bKey = ":{$keys}";
$bind[$bKey] = $vals;
$sql[] = '`'.$key.'` = '.$bKey;
}
$bind[":id"] = $id;
$query = $con->prepare("UPDATE books SET ".implode(', ',$sql)." WHERE bookid = :id");
$query->execute($bind);
}
# This is is just a specific function to focus on title. Not sure you need
# it since the update book by id function would do the same thing
function updateBookTitle($id,$title,$con)
{
$bind[":id"] = $id;
$bind[":title"] = $title;
$query = $con->prepare("UPDATE books SET title = :title WHERE bookid = :id");
$query->execute($bind);
}
# This will fetch the id value from a global
function getId($type = false)
{
switch($type) {
case('post'):
return (isset($_POST['bookid']))? $_POST['bookid'] : false;
case('req'):
return (isset($_REQUEST['bookid']))? $_REQUEST['bookid'] : false;
default:
return (isset($_GET['bookid']))? $_GET['bookid'] : false;
}
}
# This will sit and just wait for the right globals activate it
function bookObserver($con,&$curr)
{
autoload('getId');
if(getId('req')) {
autoload('getBookById');
$books = getBookById(getId('req'),$con);
if(!empty($books))
$curr = $books;
if(isset($_POST['Update'])) {
$values = array(
'title' => $_POST['title'],
'author' => $_POST['author'],
'publisher' => $_POST['publisher'],
'numcopies' => $_POST['numcopies'],
'shelfno' => $_POST['shelfno'],
'status' => $_POST['status']
);
autoload('updateBookById');
updateBookById(getId('req'),$values,$con);
}
}
}
# This sits and waits for the update to write the table to the page
function bookListObserver($current,$con)
{
if(isset($_POST['Update'])) {
autoload('bookList');
echo bookList(((!empty($current['status']))? $current['status'] : false),$con);
}
}
# This will just check if a value is set. Saves on scripting
function getValue($array,$key,$def = false)
{
return (!empty($array[$key]))? $array[$key] : $def;
}
# Displays your book list. Currently you are only showing the last book,
# which doesn't appear correct. No point in getting all books but only showing
# the last one
function bookList($selected = false,$con)
{
autoload('getBooks');
$books = getBooks($con);
ob_start();
?>
<table>
<tr>
<th>BookID</th>
<th>Title</th>
<th>Author</th>
<th>Publisher</th>
<th>numcopies</th>
<th>shelfno</th>
<th>status</th>
<th>Action</th>
</tr>
<?php foreach($books as $row) { ?>
<tr>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo $row['publisher'] ?></td>
<td><?php echo $row['numcopies'] ?></td>
<td><?php echo $row['shelfno'] ?></td>
<td><?php echo $row['status'] ?></td>
</tr>
<?php } ?>
</table>
<?php
if($selected == "Available")
echo "selected";
elseif($selected == "Unavailable")
echo "selected";
$data = ob_get_contents();
ob_end_clean();
return $data;
}
# This is your mysql connection, it requires attention to build out
# It's not as useful as it could be, so you will want to research it
function connect()
{
return new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
}
# This is just a handy function to autoload functions when you want
# to use them. If you used classes, you would make an spl_autoload_register()
# function or install something like Composer to autoload
function autoload($name,$run = false)
{
if(is_array($name)) {
foreach($name as $func) {
autoload($func);
}
return;
}
if(!function_exists($name)) {
if(is_file($file = FUNCTIONS.DS.$name.'.php'))
include_once($file);
}
if($run) {
if(function_exists($name))
return $name();
}
}
# Make sure errors are on in testing
ini_set('display_errors',1);
error_reporting(E_ALL);
# Creating commonly-used defines will help your scripts be
# more reliable and consistent
define('DS',DIRECTORY_SEPARATOR);
define('ROOT_DIR',__DIR__);
define('FUNCTIONS',ROOT_DIR.DS.'functions');
define('DB_HOST','localhost');
define('DB_NAME','library book');
define('DB_USER','root');
define('DB_PASS','');
# Start session by default
session_start();
require_once(FUNCTIONS.DS.'autoload.php');
# Autoload the connect function and assign it
$con = autoload('connect',true);
<?php
# Add config
include(__DIR__.DIRECTORY_SEPARATOR.'config.php');
# Include all our starting page functions
autoload(array('bookObserver','bookListObserver','getBook', 'getValue'));
# Set default array for current selection
$current = array();
# Start observer, pass connection
bookObserver($con,$current);
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<?php
# This writes the table if update is set
# You should not put this html above the <html> tag
bookListObserver($current,$con);
# This gets the book from the page request
$book = getBook($con);
?>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo getValue($book,'title') ?>"><br/>
EnterAuthor:<input type="text" name="author" value="<?php echo getValue($book,'author') ?>" ><br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo getValue($book,'publisher') ?>"><br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo getValue($book,'numcopies') ?>"><br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo getValue($book,'shelfno') ?>"><br/>
<input type="hidden" name="bookid" value="<?php echo getValue($book,'bookid') ?>" />
<select>
<option value="available" <?php if(isset($current['status']) && $current['status'] == "Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if (isset($current['status']) && $current['status'] == "Unavailable") echo "selected";?>>Unavailable</option>
</select><br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
/functions/bookListObserver.php
# Create a general function to fetch all books.
function getBooks($con)
{
$result = array();
$query = $con->prepare("SELECT * FROM books");
$query->execute();
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row;
}
return $result;
}
# Create a function to fetch a specific book by id
function getBookById($id,$con)
{
$query = $con->prepare("SELECT * FROM books WHERE bookid = :id");
$query->execute(array(":id"=>$id));
$row = $query->fetch(PDO::FETCH_ASSOC);
return (!empty($row))? $row : array();
}
# This should fetch from a global request, that way you can tell if
# a book is currently being accessed
function getBook($con)
{
autoload(array('getBookById','getId'));
$id = getId('req');
if(empty($id))
return false;
return getBookById($id,$con);
}
# Create an update function that can be accessed at anytime. Use binding
# so you don't need to mess with any sort of escaping
function updateBookById($id,$values,$con)
{
foreach($values as $keys => $vals) {
$bKey = ":{$keys}";
$bind[$bKey] = $vals;
$sql[] = '`'.$key.'` = '.$bKey;
}
$bind[":id"] = $id;
$query = $con->prepare("UPDATE books SET ".implode(', ',$sql)." WHERE bookid = :id");
$query->execute($bind);
}
# This is is just a specific function to focus on title. Not sure you need
# it since the update book by id function would do the same thing
function updateBookTitle($id,$title,$con)
{
$bind[":id"] = $id;
$bind[":title"] = $title;
$query = $con->prepare("UPDATE books SET title = :title WHERE bookid = :id");
$query->execute($bind);
}
# This will fetch the id value from a global
function getId($type = false)
{
switch($type) {
case('post'):
return (isset($_POST['bookid']))? $_POST['bookid'] : false;
case('req'):
return (isset($_REQUEST['bookid']))? $_REQUEST['bookid'] : false;
default:
return (isset($_GET['bookid']))? $_GET['bookid'] : false;
}
}
# This will sit and just wait for the right globals activate it
function bookObserver($con,&$curr)
{
autoload('getId');
if(getId('req')) {
autoload('getBookById');
$books = getBookById(getId('req'),$con);
if(!empty($books))
$curr = $books;
if(isset($_POST['Update'])) {
$values = array(
'title' => $_POST['title'],
'author' => $_POST['author'],
'publisher' => $_POST['publisher'],
'numcopies' => $_POST['numcopies'],
'shelfno' => $_POST['shelfno'],
'status' => $_POST['status']
);
autoload('updateBookById');
updateBookById(getId('req'),$values,$con);
}
}
}
# This sits and waits for the update to write the table to the page
function bookListObserver($current,$con)
{
if(isset($_POST['Update'])) {
autoload('bookList');
echo bookList(((!empty($current['status']))? $current['status'] : false),$con);
}
}
# This will just check if a value is set. Saves on scripting
function getValue($array,$key,$def = false)
{
return (!empty($array[$key]))? $array[$key] : $def;
}
# Displays your book list. Currently you are only showing the last book,
# which doesn't appear correct. No point in getting all books but only showing
# the last one
function bookList($selected = false,$con)
{
autoload('getBooks');
$books = getBooks($con);
ob_start();
?>
<table>
<tr>
<th>BookID</th>
<th>Title</th>
<th>Author</th>
<th>Publisher</th>
<th>numcopies</th>
<th>shelfno</th>
<th>status</th>
<th>Action</th>
</tr>
<?php foreach($books as $row) { ?>
<tr>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo $row['publisher'] ?></td>
<td><?php echo $row['numcopies'] ?></td>
<td><?php echo $row['shelfno'] ?></td>
<td><?php echo $row['status'] ?></td>
</tr>
<?php } ?>
</table>
<?php
if($selected == "Available")
echo "selected";
elseif($selected == "Unavailable")
echo "selected";
$data = ob_get_contents();
ob_end_clean();
return $data;
}
# This is your mysql connection, it requires attention to build out
# It's not as useful as it could be, so you will want to research it
function connect()
{
return new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
}
# This is just a handy function to autoload functions when you want
# to use them. If you used classes, you would make an spl_autoload_register()
# function or install something like Composer to autoload
function autoload($name,$run = false)
{
if(is_array($name)) {
foreach($name as $func) {
autoload($func);
}
return;
}
if(!function_exists($name)) {
if(is_file($file = FUNCTIONS.DS.$name.'.php'))
include_once($file);
}
if($run) {
if(function_exists($name))
return $name();
}
}
# Make sure errors are on in testing
ini_set('display_errors',1);
error_reporting(E_ALL);
# Creating commonly-used defines will help your scripts be
# more reliable and consistent
define('DS',DIRECTORY_SEPARATOR);
define('ROOT_DIR',__DIR__);
define('FUNCTIONS',ROOT_DIR.DS.'functions');
define('DB_HOST','localhost');
define('DB_NAME','library book');
define('DB_USER','root');
define('DB_PASS','');
# Start session by default
session_start();
require_once(FUNCTIONS.DS.'autoload.php');
# Autoload the connect function and assign it
$con = autoload('connect',true);
<?php
# Add config
include(__DIR__.DIRECTORY_SEPARATOR.'config.php');
# Include all our starting page functions
autoload(array('bookObserver','bookListObserver','getBook', 'getValue'));
# Set default array for current selection
$current = array();
# Start observer, pass connection
bookObserver($con,$current);
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<?php
# This writes the table if update is set
# You should not put this html above the <html> tag
bookListObserver($current,$con);
# This gets the book from the page request
$book = getBook($con);
?>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo getValue($book,'title') ?>"><br/>
EnterAuthor:<input type="text" name="author" value="<?php echo getValue($book,'author') ?>" ><br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo getValue($book,'publisher') ?>"><br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo getValue($book,'numcopies') ?>"><br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo getValue($book,'shelfno') ?>"><br/>
<input type="hidden" name="bookid" value="<?php echo getValue($book,'bookid') ?>" />
<select>
<option value="available" <?php if(isset($current['status']) && $current['status'] == "Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if (isset($current['status']) && $current['status'] == "Unavailable") echo "selected";?>>Unavailable</option>
</select><br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
/functions/getValue.php
# Create a general function to fetch all books.
function getBooks($con)
{
$result = array();
$query = $con->prepare("SELECT * FROM books");
$query->execute();
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row;
}
return $result;
}
# Create a function to fetch a specific book by id
function getBookById($id,$con)
{
$query = $con->prepare("SELECT * FROM books WHERE bookid = :id");
$query->execute(array(":id"=>$id));
$row = $query->fetch(PDO::FETCH_ASSOC);
return (!empty($row))? $row : array();
}
# This should fetch from a global request, that way you can tell if
# a book is currently being accessed
function getBook($con)
{
autoload(array('getBookById','getId'));
$id = getId('req');
if(empty($id))
return false;
return getBookById($id,$con);
}
# Create an update function that can be accessed at anytime. Use binding
# so you don't need to mess with any sort of escaping
function updateBookById($id,$values,$con)
{
foreach($values as $keys => $vals) {
$bKey = ":{$keys}";
$bind[$bKey] = $vals;
$sql[] = '`'.$key.'` = '.$bKey;
}
$bind[":id"] = $id;
$query = $con->prepare("UPDATE books SET ".implode(', ',$sql)." WHERE bookid = :id");
$query->execute($bind);
}
# This is is just a specific function to focus on title. Not sure you need
# it since the update book by id function would do the same thing
function updateBookTitle($id,$title,$con)
{
$bind[":id"] = $id;
$bind[":title"] = $title;
$query = $con->prepare("UPDATE books SET title = :title WHERE bookid = :id");
$query->execute($bind);
}
# This will fetch the id value from a global
function getId($type = false)
{
switch($type) {
case('post'):
return (isset($_POST['bookid']))? $_POST['bookid'] : false;
case('req'):
return (isset($_REQUEST['bookid']))? $_REQUEST['bookid'] : false;
default:
return (isset($_GET['bookid']))? $_GET['bookid'] : false;
}
}
# This will sit and just wait for the right globals activate it
function bookObserver($con,&$curr)
{
autoload('getId');
if(getId('req')) {
autoload('getBookById');
$books = getBookById(getId('req'),$con);
if(!empty($books))
$curr = $books;
if(isset($_POST['Update'])) {
$values = array(
'title' => $_POST['title'],
'author' => $_POST['author'],
'publisher' => $_POST['publisher'],
'numcopies' => $_POST['numcopies'],
'shelfno' => $_POST['shelfno'],
'status' => $_POST['status']
);
autoload('updateBookById');
updateBookById(getId('req'),$values,$con);
}
}
}
# This sits and waits for the update to write the table to the page
function bookListObserver($current,$con)
{
if(isset($_POST['Update'])) {
autoload('bookList');
echo bookList(((!empty($current['status']))? $current['status'] : false),$con);
}
}
# This will just check if a value is set. Saves on scripting
function getValue($array,$key,$def = false)
{
return (!empty($array[$key]))? $array[$key] : $def;
}
# Displays your book list. Currently you are only showing the last book,
# which doesn't appear correct. No point in getting all books but only showing
# the last one
function bookList($selected = false,$con)
{
autoload('getBooks');
$books = getBooks($con);
ob_start();
?>
<table>
<tr>
<th>BookID</th>
<th>Title</th>
<th>Author</th>
<th>Publisher</th>
<th>numcopies</th>
<th>shelfno</th>
<th>status</th>
<th>Action</th>
</tr>
<?php foreach($books as $row) { ?>
<tr>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo $row['publisher'] ?></td>
<td><?php echo $row['numcopies'] ?></td>
<td><?php echo $row['shelfno'] ?></td>
<td><?php echo $row['status'] ?></td>
</tr>
<?php } ?>
</table>
<?php
if($selected == "Available")
echo "selected";
elseif($selected == "Unavailable")
echo "selected";
$data = ob_get_contents();
ob_end_clean();
return $data;
}
# This is your mysql connection, it requires attention to build out
# It's not as useful as it could be, so you will want to research it
function connect()
{
return new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
}
# This is just a handy function to autoload functions when you want
# to use them. If you used classes, you would make an spl_autoload_register()
# function or install something like Composer to autoload
function autoload($name,$run = false)
{
if(is_array($name)) {
foreach($name as $func) {
autoload($func);
}
return;
}
if(!function_exists($name)) {
if(is_file($file = FUNCTIONS.DS.$name.'.php'))
include_once($file);
}
if($run) {
if(function_exists($name))
return $name();
}
}
# Make sure errors are on in testing
ini_set('display_errors',1);
error_reporting(E_ALL);
# Creating commonly-used defines will help your scripts be
# more reliable and consistent
define('DS',DIRECTORY_SEPARATOR);
define('ROOT_DIR',__DIR__);
define('FUNCTIONS',ROOT_DIR.DS.'functions');
define('DB_HOST','localhost');
define('DB_NAME','library book');
define('DB_USER','root');
define('DB_PASS','');
# Start session by default
session_start();
require_once(FUNCTIONS.DS.'autoload.php');
# Autoload the connect function and assign it
$con = autoload('connect',true);
<?php
# Add config
include(__DIR__.DIRECTORY_SEPARATOR.'config.php');
# Include all our starting page functions
autoload(array('bookObserver','bookListObserver','getBook', 'getValue'));
# Set default array for current selection
$current = array();
# Start observer, pass connection
bookObserver($con,$current);
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<?php
# This writes the table if update is set
# You should not put this html above the <html> tag
bookListObserver($current,$con);
# This gets the book from the page request
$book = getBook($con);
?>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo getValue($book,'title') ?>"><br/>
EnterAuthor:<input type="text" name="author" value="<?php echo getValue($book,'author') ?>" ><br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo getValue($book,'publisher') ?>"><br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo getValue($book,'numcopies') ?>"><br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo getValue($book,'shelfno') ?>"><br/>
<input type="hidden" name="bookid" value="<?php echo getValue($book,'bookid') ?>" />
<select>
<option value="available" <?php if(isset($current['status']) && $current['status'] == "Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if (isset($current['status']) && $current['status'] == "Unavailable") echo "selected";?>>Unavailable</option>
</select><br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
/functions/bookList.php
# Create a general function to fetch all books.
function getBooks($con)
{
$result = array();
$query = $con->prepare("SELECT * FROM books");
$query->execute();
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row;
}
return $result;
}
# Create a function to fetch a specific book by id
function getBookById($id,$con)
{
$query = $con->prepare("SELECT * FROM books WHERE bookid = :id");
$query->execute(array(":id"=>$id));
$row = $query->fetch(PDO::FETCH_ASSOC);
return (!empty($row))? $row : array();
}
# This should fetch from a global request, that way you can tell if
# a book is currently being accessed
function getBook($con)
{
autoload(array('getBookById','getId'));
$id = getId('req');
if(empty($id))
return false;
return getBookById($id,$con);
}
# Create an update function that can be accessed at anytime. Use binding
# so you don't need to mess with any sort of escaping
function updateBookById($id,$values,$con)
{
foreach($values as $keys => $vals) {
$bKey = ":{$keys}";
$bind[$bKey] = $vals;
$sql[] = '`'.$key.'` = '.$bKey;
}
$bind[":id"] = $id;
$query = $con->prepare("UPDATE books SET ".implode(', ',$sql)." WHERE bookid = :id");
$query->execute($bind);
}
# This is is just a specific function to focus on title. Not sure you need
# it since the update book by id function would do the same thing
function updateBookTitle($id,$title,$con)
{
$bind[":id"] = $id;
$bind[":title"] = $title;
$query = $con->prepare("UPDATE books SET title = :title WHERE bookid = :id");
$query->execute($bind);
}
# This will fetch the id value from a global
function getId($type = false)
{
switch($type) {
case('post'):
return (isset($_POST['bookid']))? $_POST['bookid'] : false;
case('req'):
return (isset($_REQUEST['bookid']))? $_REQUEST['bookid'] : false;
default:
return (isset($_GET['bookid']))? $_GET['bookid'] : false;
}
}
# This will sit and just wait for the right globals activate it
function bookObserver($con,&$curr)
{
autoload('getId');
if(getId('req')) {
autoload('getBookById');
$books = getBookById(getId('req'),$con);
if(!empty($books))
$curr = $books;
if(isset($_POST['Update'])) {
$values = array(
'title' => $_POST['title'],
'author' => $_POST['author'],
'publisher' => $_POST['publisher'],
'numcopies' => $_POST['numcopies'],
'shelfno' => $_POST['shelfno'],
'status' => $_POST['status']
);
autoload('updateBookById');
updateBookById(getId('req'),$values,$con);
}
}
}
# This sits and waits for the update to write the table to the page
function bookListObserver($current,$con)
{
if(isset($_POST['Update'])) {
autoload('bookList');
echo bookList(((!empty($current['status']))? $current['status'] : false),$con);
}
}
# This will just check if a value is set. Saves on scripting
function getValue($array,$key,$def = false)
{
return (!empty($array[$key]))? $array[$key] : $def;
}
# Displays your book list. Currently you are only showing the last book,
# which doesn't appear correct. No point in getting all books but only showing
# the last one
function bookList($selected = false,$con)
{
autoload('getBooks');
$books = getBooks($con);
ob_start();
?>
<table>
<tr>
<th>BookID</th>
<th>Title</th>
<th>Author</th>
<th>Publisher</th>
<th>numcopies</th>
<th>shelfno</th>
<th>status</th>
<th>Action</th>
</tr>
<?php foreach($books as $row) { ?>
<tr>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo $row['publisher'] ?></td>
<td><?php echo $row['numcopies'] ?></td>
<td><?php echo $row['shelfno'] ?></td>
<td><?php echo $row['status'] ?></td>
</tr>
<?php } ?>
</table>
<?php
if($selected == "Available")
echo "selected";
elseif($selected == "Unavailable")
echo "selected";
$data = ob_get_contents();
ob_end_clean();
return $data;
}
# This is your mysql connection, it requires attention to build out
# It's not as useful as it could be, so you will want to research it
function connect()
{
return new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
}
# This is just a handy function to autoload functions when you want
# to use them. If you used classes, you would make an spl_autoload_register()
# function or install something like Composer to autoload
function autoload($name,$run = false)
{
if(is_array($name)) {
foreach($name as $func) {
autoload($func);
}
return;
}
if(!function_exists($name)) {
if(is_file($file = FUNCTIONS.DS.$name.'.php'))
include_once($file);
}
if($run) {
if(function_exists($name))
return $name();
}
}
# Make sure errors are on in testing
ini_set('display_errors',1);
error_reporting(E_ALL);
# Creating commonly-used defines will help your scripts be
# more reliable and consistent
define('DS',DIRECTORY_SEPARATOR);
define('ROOT_DIR',__DIR__);
define('FUNCTIONS',ROOT_DIR.DS.'functions');
define('DB_HOST','localhost');
define('DB_NAME','library book');
define('DB_USER','root');
define('DB_PASS','');
# Start session by default
session_start();
require_once(FUNCTIONS.DS.'autoload.php');
# Autoload the connect function and assign it
$con = autoload('connect',true);
<?php
# Add config
include(__DIR__.DIRECTORY_SEPARATOR.'config.php');
# Include all our starting page functions
autoload(array('bookObserver','bookListObserver','getBook', 'getValue'));
# Set default array for current selection
$current = array();
# Start observer, pass connection
bookObserver($con,$current);
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<?php
# This writes the table if update is set
# You should not put this html above the <html> tag
bookListObserver($current,$con);
# This gets the book from the page request
$book = getBook($con);
?>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo getValue($book,'title') ?>"><br/>
EnterAuthor:<input type="text" name="author" value="<?php echo getValue($book,'author') ?>" ><br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo getValue($book,'publisher') ?>"><br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo getValue($book,'numcopies') ?>"><br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo getValue($book,'shelfno') ?>"><br/>
<input type="hidden" name="bookid" value="<?php echo getValue($book,'bookid') ?>" />
<select>
<option value="available" <?php if(isset($current['status']) && $current['status'] == "Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if (isset($current['status']) && $current['status'] == "Unavailable") echo "selected";?>>Unavailable</option>
</select><br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
/functions/autoload.php
# Create a general function to fetch all books.
function getBooks($con)
{
$result = array();
$query = $con->prepare("SELECT * FROM books");
$query->execute();
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row;
}
return $result;
}
# Create a function to fetch a specific book by id
function getBookById($id,$con)
{
$query = $con->prepare("SELECT * FROM books WHERE bookid = :id");
$query->execute(array(":id"=>$id));
$row = $query->fetch(PDO::FETCH_ASSOC);
return (!empty($row))? $row : array();
}
# This should fetch from a global request, that way you can tell if
# a book is currently being accessed
function getBook($con)
{
autoload(array('getBookById','getId'));
$id = getId('req');
if(empty($id))
return false;
return getBookById($id,$con);
}
# Create an update function that can be accessed at anytime. Use binding
# so you don't need to mess with any sort of escaping
function updateBookById($id,$values,$con)
{
foreach($values as $keys => $vals) {
$bKey = ":{$keys}";
$bind[$bKey] = $vals;
$sql[] = '`'.$key.'` = '.$bKey;
}
$bind[":id"] = $id;
$query = $con->prepare("UPDATE books SET ".implode(', ',$sql)." WHERE bookid = :id");
$query->execute($bind);
}
# This is is just a specific function to focus on title. Not sure you need
# it since the update book by id function would do the same thing
function updateBookTitle($id,$title,$con)
{
$bind[":id"] = $id;
$bind[":title"] = $title;
$query = $con->prepare("UPDATE books SET title = :title WHERE bookid = :id");
$query->execute($bind);
}
# This will fetch the id value from a global
function getId($type = false)
{
switch($type) {
case('post'):
return (isset($_POST['bookid']))? $_POST['bookid'] : false;
case('req'):
return (isset($_REQUEST['bookid']))? $_REQUEST['bookid'] : false;
default:
return (isset($_GET['bookid']))? $_GET['bookid'] : false;
}
}
# This will sit and just wait for the right globals activate it
function bookObserver($con,&$curr)
{
autoload('getId');
if(getId('req')) {
autoload('getBookById');
$books = getBookById(getId('req'),$con);
if(!empty($books))
$curr = $books;
if(isset($_POST['Update'])) {
$values = array(
'title' => $_POST['title'],
'author' => $_POST['author'],
'publisher' => $_POST['publisher'],
'numcopies' => $_POST['numcopies'],
'shelfno' => $_POST['shelfno'],
'status' => $_POST['status']
);
autoload('updateBookById');
updateBookById(getId('req'),$values,$con);
}
}
}
# This sits and waits for the update to write the table to the page
function bookListObserver($current,$con)
{
if(isset($_POST['Update'])) {
autoload('bookList');
echo bookList(((!empty($current['status']))? $current['status'] : false),$con);
}
}
# This will just check if a value is set. Saves on scripting
function getValue($array,$key,$def = false)
{
return (!empty($array[$key]))? $array[$key] : $def;
}
# Displays your book list. Currently you are only showing the last book,
# which doesn't appear correct. No point in getting all books but only showing
# the last one
function bookList($selected = false,$con)
{
autoload('getBooks');
$books = getBooks($con);
ob_start();
?>
<table>
<tr>
<th>BookID</th>
<th>Title</th>
<th>Author</th>
<th>Publisher</th>
<th>numcopies</th>
<th>shelfno</th>
<th>status</th>
<th>Action</th>
</tr>
<?php foreach($books as $row) { ?>
<tr>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo $row['publisher'] ?></td>
<td><?php echo $row['numcopies'] ?></td>
<td><?php echo $row['shelfno'] ?></td>
<td><?php echo $row['status'] ?></td>
</tr>
<?php } ?>
</table>
<?php
if($selected == "Available")
echo "selected";
elseif($selected == "Unavailable")
echo "selected";
$data = ob_get_contents();
ob_end_clean();
return $data;
}
# This is your mysql connection, it requires attention to build out
# It's not as useful as it could be, so you will want to research it
function connect()
{
return new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
}
# This is just a handy function to autoload functions when you want
# to use them. If you used classes, you would make an spl_autoload_register()
# function or install something like Composer to autoload
function autoload($name,$run = false)
{
if(is_array($name)) {
foreach($name as $func) {
autoload($func);
}
return;
}
if(!function_exists($name)) {
if(is_file($file = FUNCTIONS.DS.$name.'.php'))
include_once($file);
}
if($run) {
if(function_exists($name))
return $name();
}
}
# Make sure errors are on in testing
ini_set('display_errors',1);
error_reporting(E_ALL);
# Creating commonly-used defines will help your scripts be
# more reliable and consistent
define('DS',DIRECTORY_SEPARATOR);
define('ROOT_DIR',__DIR__);
define('FUNCTIONS',ROOT_DIR.DS.'functions');
define('DB_HOST','localhost');
define('DB_NAME','library book');
define('DB_USER','root');
define('DB_PASS','');
# Start session by default
session_start();
require_once(FUNCTIONS.DS.'autoload.php');
# Autoload the connect function and assign it
$con = autoload('connect',true);
<?php
# Add config
include(__DIR__.DIRECTORY_SEPARATOR.'config.php');
# Include all our starting page functions
autoload(array('bookObserver','bookListObserver','getBook', 'getValue'));
# Set default array for current selection
$current = array();
# Start observer, pass connection
bookObserver($con,$current);
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<?php
# This writes the table if update is set
# You should not put this html above the <html> tag
bookListObserver($current,$con);
# This gets the book from the page request
$book = getBook($con);
?>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo getValue($book,'title') ?>"><br/>
EnterAuthor:<input type="text" name="author" value="<?php echo getValue($book,'author') ?>" ><br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo getValue($book,'publisher') ?>"><br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo getValue($book,'numcopies') ?>"><br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo getValue($book,'shelfno') ?>"><br/>
<input type="hidden" name="bookid" value="<?php echo getValue($book,'bookid') ?>" />
<select>
<option value="available" <?php if(isset($current['status']) && $current['status'] == "Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if (isset($current['status']) && $current['status'] == "Unavailable") echo "selected";?>>Unavailable</option>
</select><br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
/config.php
# Create a general function to fetch all books.
function getBooks($con)
{
$result = array();
$query = $con->prepare("SELECT * FROM books");
$query->execute();
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row;
}
return $result;
}
# Create a function to fetch a specific book by id
function getBookById($id,$con)
{
$query = $con->prepare("SELECT * FROM books WHERE bookid = :id");
$query->execute(array(":id"=>$id));
$row = $query->fetch(PDO::FETCH_ASSOC);
return (!empty($row))? $row : array();
}
# This should fetch from a global request, that way you can tell if
# a book is currently being accessed
function getBook($con)
{
autoload(array('getBookById','getId'));
$id = getId('req');
if(empty($id))
return false;
return getBookById($id,$con);
}
# Create an update function that can be accessed at anytime. Use binding
# so you don't need to mess with any sort of escaping
function updateBookById($id,$values,$con)
{
foreach($values as $keys => $vals) {
$bKey = ":{$keys}";
$bind[$bKey] = $vals;
$sql[] = '`'.$key.'` = '.$bKey;
}
$bind[":id"] = $id;
$query = $con->prepare("UPDATE books SET ".implode(', ',$sql)." WHERE bookid = :id");
$query->execute($bind);
}
# This is is just a specific function to focus on title. Not sure you need
# it since the update book by id function would do the same thing
function updateBookTitle($id,$title,$con)
{
$bind[":id"] = $id;
$bind[":title"] = $title;
$query = $con->prepare("UPDATE books SET title = :title WHERE bookid = :id");
$query->execute($bind);
}
# This will fetch the id value from a global
function getId($type = false)
{
switch($type) {
case('post'):
return (isset($_POST['bookid']))? $_POST['bookid'] : false;
case('req'):
return (isset($_REQUEST['bookid']))? $_REQUEST['bookid'] : false;
default:
return (isset($_GET['bookid']))? $_GET['bookid'] : false;
}
}
# This will sit and just wait for the right globals activate it
function bookObserver($con,&$curr)
{
autoload('getId');
if(getId('req')) {
autoload('getBookById');
$books = getBookById(getId('req'),$con);
if(!empty($books))
$curr = $books;
if(isset($_POST['Update'])) {
$values = array(
'title' => $_POST['title'],
'author' => $_POST['author'],
'publisher' => $_POST['publisher'],
'numcopies' => $_POST['numcopies'],
'shelfno' => $_POST['shelfno'],
'status' => $_POST['status']
);
autoload('updateBookById');
updateBookById(getId('req'),$values,$con);
}
}
}
# This sits and waits for the update to write the table to the page
function bookListObserver($current,$con)
{
if(isset($_POST['Update'])) {
autoload('bookList');
echo bookList(((!empty($current['status']))? $current['status'] : false),$con);
}
}
# This will just check if a value is set. Saves on scripting
function getValue($array,$key,$def = false)
{
return (!empty($array[$key]))? $array[$key] : $def;
}
# Displays your book list. Currently you are only showing the last book,
# which doesn't appear correct. No point in getting all books but only showing
# the last one
function bookList($selected = false,$con)
{
autoload('getBooks');
$books = getBooks($con);
ob_start();
?>
<table>
<tr>
<th>BookID</th>
<th>Title</th>
<th>Author</th>
<th>Publisher</th>
<th>numcopies</th>
<th>shelfno</th>
<th>status</th>
<th>Action</th>
</tr>
<?php foreach($books as $row) { ?>
<tr>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo $row['publisher'] ?></td>
<td><?php echo $row['numcopies'] ?></td>
<td><?php echo $row['shelfno'] ?></td>
<td><?php echo $row['status'] ?></td>
</tr>
<?php } ?>
</table>
<?php
if($selected == "Available")
echo "selected";
elseif($selected == "Unavailable")
echo "selected";
$data = ob_get_contents();
ob_end_clean();
return $data;
}
# This is your mysql connection, it requires attention to build out
# It's not as useful as it could be, so you will want to research it
function connect()
{
return new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
}
# This is just a handy function to autoload functions when you want
# to use them. If you used classes, you would make an spl_autoload_register()
# function or install something like Composer to autoload
function autoload($name,$run = false)
{
if(is_array($name)) {
foreach($name as $func) {
autoload($func);
}
return;
}
if(!function_exists($name)) {
if(is_file($file = FUNCTIONS.DS.$name.'.php'))
include_once($file);
}
if($run) {
if(function_exists($name))
return $name();
}
}
# Make sure errors are on in testing
ini_set('display_errors',1);
error_reporting(E_ALL);
# Creating commonly-used defines will help your scripts be
# more reliable and consistent
define('DS',DIRECTORY_SEPARATOR);
define('ROOT_DIR',__DIR__);
define('FUNCTIONS',ROOT_DIR.DS.'functions');
define('DB_HOST','localhost');
define('DB_NAME','library book');
define('DB_USER','root');
define('DB_PASS','');
# Start session by default
session_start();
require_once(FUNCTIONS.DS.'autoload.php');
# Autoload the connect function and assign it
$con = autoload('connect',true);
<?php
# Add config
include(__DIR__.DIRECTORY_SEPARATOR.'config.php');
# Include all our starting page functions
autoload(array('bookObserver','bookListObserver','getBook', 'getValue'));
# Set default array for current selection
$current = array();
# Start observer, pass connection
bookObserver($con,$current);
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<?php
# This writes the table if update is set
# You should not put this html above the <html> tag
bookListObserver($current,$con);
# This gets the book from the page request
$book = getBook($con);
?>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo getValue($book,'title') ?>"><br/>
EnterAuthor:<input type="text" name="author" value="<?php echo getValue($book,'author') ?>" ><br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo getValue($book,'publisher') ?>"><br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo getValue($book,'numcopies') ?>"><br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo getValue($book,'shelfno') ?>"><br/>
<input type="hidden" name="bookid" value="<?php echo getValue($book,'bookid') ?>" />
<select>
<option value="available" <?php if(isset($current['status']) && $current['status'] == "Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if (isset($current['status']) && $current['status'] == "Unavailable") echo "selected";?>>Unavailable</option>
</select><br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
/index.php
# Create a general function to fetch all books.
function getBooks($con)
{
$result = array();
$query = $con->prepare("SELECT * FROM books");
$query->execute();
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
$result[] = $row;
}
return $result;
}
# Create a function to fetch a specific book by id
function getBookById($id,$con)
{
$query = $con->prepare("SELECT * FROM books WHERE bookid = :id");
$query->execute(array(":id"=>$id));
$row = $query->fetch(PDO::FETCH_ASSOC);
return (!empty($row))? $row : array();
}
# This should fetch from a global request, that way you can tell if
# a book is currently being accessed
function getBook($con)
{
autoload(array('getBookById','getId'));
$id = getId('req');
if(empty($id))
return false;
return getBookById($id,$con);
}
# Create an update function that can be accessed at anytime. Use binding
# so you don't need to mess with any sort of escaping
function updateBookById($id,$values,$con)
{
foreach($values as $keys => $vals) {
$bKey = ":{$keys}";
$bind[$bKey] = $vals;
$sql[] = '`'.$key.'` = '.$bKey;
}
$bind[":id"] = $id;
$query = $con->prepare("UPDATE books SET ".implode(', ',$sql)." WHERE bookid = :id");
$query->execute($bind);
}
# This is is just a specific function to focus on title. Not sure you need
# it since the update book by id function would do the same thing
function updateBookTitle($id,$title,$con)
{
$bind[":id"] = $id;
$bind[":title"] = $title;
$query = $con->prepare("UPDATE books SET title = :title WHERE bookid = :id");
$query->execute($bind);
}
# This will fetch the id value from a global
function getId($type = false)
{
switch($type) {
case('post'):
return (isset($_POST['bookid']))? $_POST['bookid'] : false;
case('req'):
return (isset($_REQUEST['bookid']))? $_REQUEST['bookid'] : false;
default:
return (isset($_GET['bookid']))? $_GET['bookid'] : false;
}
}
# This will sit and just wait for the right globals activate it
function bookObserver($con,&$curr)
{
autoload('getId');
if(getId('req')) {
autoload('getBookById');
$books = getBookById(getId('req'),$con);
if(!empty($books))
$curr = $books;
if(isset($_POST['Update'])) {
$values = array(
'title' => $_POST['title'],
'author' => $_POST['author'],
'publisher' => $_POST['publisher'],
'numcopies' => $_POST['numcopies'],
'shelfno' => $_POST['shelfno'],
'status' => $_POST['status']
);
autoload('updateBookById');
updateBookById(getId('req'),$values,$con);
}
}
}
# This sits and waits for the update to write the table to the page
function bookListObserver($current,$con)
{
if(isset($_POST['Update'])) {
autoload('bookList');
echo bookList(((!empty($current['status']))? $current['status'] : false),$con);
}
}
# This will just check if a value is set. Saves on scripting
function getValue($array,$key,$def = false)
{
return (!empty($array[$key]))? $array[$key] : $def;
}
# Displays your book list. Currently you are only showing the last book,
# which doesn't appear correct. No point in getting all books but only showing
# the last one
function bookList($selected = false,$con)
{
autoload('getBooks');
$books = getBooks($con);
ob_start();
?>
<table>
<tr>
<th>BookID</th>
<th>Title</th>
<th>Author</th>
<th>Publisher</th>
<th>numcopies</th>
<th>shelfno</th>
<th>status</th>
<th>Action</th>
</tr>
<?php foreach($books as $row) { ?>
<tr>
<td><?php echo $row['title'] ?></td>
<td><?php echo $row['author'] ?></td>
<td><?php echo $row['publisher'] ?></td>
<td><?php echo $row['numcopies'] ?></td>
<td><?php echo $row['shelfno'] ?></td>
<td><?php echo $row['status'] ?></td>
</tr>
<?php } ?>
</table>
<?php
if($selected == "Available")
echo "selected";
elseif($selected == "Unavailable")
echo "selected";
$data = ob_get_contents();
ob_end_clean();
return $data;
}
# This is your mysql connection, it requires attention to build out
# It's not as useful as it could be, so you will want to research it
function connect()
{
return new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
}
# This is just a handy function to autoload functions when you want
# to use them. If you used classes, you would make an spl_autoload_register()
# function or install something like Composer to autoload
function autoload($name,$run = false)
{
if(is_array($name)) {
foreach($name as $func) {
autoload($func);
}
return;
}
if(!function_exists($name)) {
if(is_file($file = FUNCTIONS.DS.$name.'.php'))
include_once($file);
}
if($run) {
if(function_exists($name))
return $name();
}
}
# Make sure errors are on in testing
ini_set('display_errors',1);
error_reporting(E_ALL);
# Creating commonly-used defines will help your scripts be
# more reliable and consistent
define('DS',DIRECTORY_SEPARATOR);
define('ROOT_DIR',__DIR__);
define('FUNCTIONS',ROOT_DIR.DS.'functions');
define('DB_HOST','localhost');
define('DB_NAME','library book');
define('DB_USER','root');
define('DB_PASS','');
# Start session by default
session_start();
require_once(FUNCTIONS.DS.'autoload.php');
# Autoload the connect function and assign it
$con = autoload('connect',true);
<?php
# Add config
include(__DIR__.DIRECTORY_SEPARATOR.'config.php');
# Include all our starting page functions
autoload(array('bookObserver','bookListObserver','getBook', 'getValue'));
# Set default array for current selection
$current = array();
# Start observer, pass connection
bookObserver($con,$current);
?>
<html>
<head><title>Editing the fields</title>
<style>
body {
background-color: rgb(255,0,255);
}
</style>
</head>
<body>
<?php
# This writes the table if update is set
# You should not put this html above the <html> tag
bookListObserver($current,$con);
# This gets the book from the page request
$book = getBook($con);
?>
<form action="edit1.php" action="post">
EnterTitle:<input type="text" name="title" value="<?php echo getValue($book,'title') ?>"><br/>
EnterAuthor:<input type="text" name="author" value="<?php echo getValue($book,'author') ?>" ><br/>
EnterPublisher:<input type="text" name="publisher" value="<?php echo getValue($book,'publisher') ?>"><br/>
EnterNumCopies:<input type="text" name="numcopies" value="<?php echo getValue($book,'numcopies') ?>"><br/>
EnterShelfNo:<input type="text" name="shelfno" value="<?php echo getValue($book,'shelfno') ?>"><br/>
<input type="hidden" name="bookid" value="<?php echo getValue($book,'bookid') ?>" />
<select>
<option value="available" <?php if(isset($current['status']) && $current['status'] == "Available") echo "selected";?>>Available</option>
<option value="unavailable" <?php if (isset($current['status']) && $current['status'] == "Unavailable") echo "selected";?>>Unavailable</option>
</select><br>
<input type="submit" name="submit" value="Update">
</form>
</body>
</html>
编辑字段
身体{
背景色：rgb（255,0255）；
}
输入标题：使用mysqli
或pdo
扩展名mysql
扩展已被弃用。请注意，不要这样做，bookid=$\u GET['book\u id']$str=“从bookid=$bookid的书籍中选择*”。这是清除数据库的一种简单方法。您应该在邮寄中发送图书id。“使用输入类型”具有“隐藏并再次搜索”以获取$query2，因为当您提交页面时，它将刷新页面，而此时您将获得$\u POST值而不是$\u get，因此它不会进入$\u get条件可能重复