Php 如何从数据库中回显包含特定变量的行
首先,我的数据库表设置如下: id | affsub |报价|姓名|日期|时间|付款 1 | stringhere | offer | 2017-09-12 | 06:47:00 | 1 我想将包含affsubstringhere的所有行回显到html表中。我试过这个:Php 如何从数据库中回显包含特定变量的行,php,html,mysql,database,phpmyadmin,Php,Html,Mysql,Database,Phpmyadmin,首先,我的数据库表设置如下: id | affsub |报价|姓名|日期|时间|付款 1 | stringhere | offer | 2017-09-12 | 06:47:00 | 1 我想将包含affsubstringhere的所有行回显到html表中。我试过这个: <?php $id = $get_info_id; $mysqli = new \mysqli('localhost', 'user', 'pass', 'db'); $aff = $mysqli->
<?php
$id = $get_info_id;
$mysqli = new \mysqli('localhost', 'user', 'pass', 'db');
$aff = $mysqli->query("SELECT affsub FROM users WHERE id = $id")->fetch_object()->affsub;
$affsub = $aff;
$userinfo= $mysqli->query("SELECT offer_name, time, payout FROM conversions WHERE affsub = ". $affsub . "");
if ($userinfo->num_rows > 0) {
while($row = $userinfo->fetch_assoc()) {
echo '<tr>
<td><b><color=black>' .$row['offer_name'].' </b></td>
<td><color=black>' .$row['time'].'</td>
<td>$<color=black>' .$row['payout'].'</td>
</tr>';
}
}
else {
echo "<b><center>No Conversions Have Happened.</center></b>";
}
?>
我知道它得到了affsub,因为如果我回显$affsub,我的affsub会被回显出来,但表上没有显示任何内容,我不确定发生了什么。您应该简单地将两个查询合并起来:
$userinfo = $mysql->query("SELECT c.offer_name, c.time, c.payout
FROM conversations AS c
JOIN users AS u ON u.affsub = c.affsub
WHERE u.id = $id");
我认为问题在于WHERE子句中搜索词缺少倒逗号。它应该是这样的:affsub='$affsub' 试试这个
$userinfo= $mysqli->query("SELECT offer_name, time, payout FROM conversions WHERE affsub = '$affsub' ");
请注意,我使用的sql语句的积分属于@Barmar,因为他昨天首先想到了连接查询 下面是要使用的两种方法。请注意,我没有使用任何OOP或函数。原因是我想让你有一个所有步骤的紧凑视图
如何使用mysqli准备的语句和异常处理 1.使用get_result()+fetch_object()或fetch_array()或fetch_all(): 此方法(推荐)仅在安装/激活驱动程序mysqlnd(MySQL本机驱动程序)时有效。我认为驱动程序在PHP>=5.3中默认激活。实现代码并让它运行。它应该会起作用。如果它有效,那么它就是完美的。如果没有,请尝试激活mysqlnd驱动程序,例如在php.ini中取消注释
extension=php\u mysqli\u mysqlnd.dll
。否则,必须使用第二种方法(2)
在html代码中也做相应的更改
NB:如何使用fetch_all()代替fetch_object():
//...
if ($numberOfRows > 0) {
/*
* Use mysqli_result::fetch_array to fetch a row at a time.
* e.g. use it in a loop construct like 'while'.
*/
while ($row = $result->fetch_array(MYSQLI_ASSOC)) {
$fetchedData[] = $row;
}
}
//...
//...
if ($numberOfRows > 0) {
/*
* Use mysqli_result::fetch_all to fetch all rows at once.
*/
$fetchedData = $result->fetch_all(MYSQLI_ASSOC);
}
//...
在html代码中也做相应的更改
2.使用store_result()+bind_result()+fetch():
在没有驱动程序mysqlnd(MySQL本机驱动程序)的情况下工作
示例代码:Mysqli准备的语句和异常处理
桌子{
字体系列:“Verdana”,Arial,无衬线;
字体大小:14px;
边界塌陷:塌陷;
}
表,th,td{
边框:1px实心#ccc;
}
th,td{
填充:7px;
}
泰德{
颜色:#fff;
字体大小:正常;
背景颜色:珊瑚;
}
t脚掌{
背景色:小麦;
}
tfoot td{
文本对齐:右对齐;
}
阴极射线管。不
报盘名称
时间
支出
-找到的记录-
没有找到任何记录。
最后,我建议您使用面向对象的方法,比如实现MySQLiConnection类(用于处理db连接)和MySQLiAdapter类(用于处理查询功能)。这两个类只应实例化一次。MySQLiConnection应该作为构造函数参数传递给MySQLiAdapter类。MySQLiAdapter类需要一个MySQLiConnection类来查询数据库和接收结果。您也可以通过实现相应的接口来扩展它们的使用,但我尽量使我的解释保持简单
我还建议您使用PDO而不是MySQLi。我在实现这段代码时发现的原因之一是:MySQLi中有点挑战性的异常处理系统
祝你好运 您正在尝试将查询结果用作另一个查询中的where子句$userinfo=$mysqli->query(“选择offer_名称、时间、转换支付,其中affsub=“.$affsub.”);是,因为我想使用用户的id,从另一个表中查找用户,并将其用于此目的table@Accountantم我已经解决了这个问题,但现在如何修复sql注入漏洞?不需要,但谢谢。我将其作为一个答案发布,只是因为您需要一个示例,而且这是您查看代码的最佳方式。所以不要接受它。无论如何,也请发布
转换表的列。不,这称为转义参数。如果使用正确的数据库编码,它可以保护您免受SQL注入攻击。但我们人类通常会忘记逃避某些事情。这是关于切换到准备好的语句。搜索主题并等待@aendeerei示例tomorrow@awesomexbox3不客气。尽量使用预先准备好的语句和异常处理。祝你好运。@awesomexbox3 P.S:你的表需要一些重构。这两者在id列上应该是外键关系。好吧,但既然我使用的是用户管理框架,我应该去掉define('MYSQL_HOST','…');定义('MYSQL_PORT','…');定义('MYSQL_数据库','…');定义('MYSQL_字符集','utf8');定义('MYSQL_USERNAME','…');定义('MYSQL_密码','…');然后把它放在我的db文件中,这是最简单的安全方法吗?或者有没有更简单的方法,因为我对cnv的内容感到困惑。是?@awesomexbox3是的,不应在发生数据库连接的页面中定义这些常量。例如,定义一个函数(可能在连接类中)以连接到db。然后,这些连接字符串变量应定义为函数的参数。像公共函数connect($host,$port,$dbName,…)
。价值观
//...
if ($numberOfRows > 0) {
/*
* Use mysqli_result::fetch_all to fetch all rows at once.
*/
$fetchedData = $result->fetch_all(MYSQLI_ASSOC);
}
//...
<?php
/*
* Define constants for db connection.
*/
define('MYSQL_HOST', '...');
define('MYSQL_PORT', '...');
define('MYSQL_DATABASE', '...');
define('MYSQL_CHARSET', 'utf8');
define('MYSQL_USERNAME', '...');
define('MYSQL_PASSWORD', '...');
/*
* Activate PHP error reporting.
* Use ONLY on development code, NEVER on production code!!!
* ALWAYS resolve WARNINGS and ERRORS.
* I recommend to always resolve NOTICES too.
*/
error_reporting(E_ALL);
ini_set('display_errors', 1);
/*
* Enable internal report functions. This enables the exception handling,
* e.g. mysqli will not throw PHP warnings anymore, but mysqli exceptions
* (mysqli_sql_exception). They are catched in the try-catch block.
*
* MYSQLI_REPORT_ERROR: Report errors from mysqli function calls.
* MYSQLI_REPORT_STRICT: Throw a mysqli_sql_exception for errors instead of warnings.
*
* See:
* http://php.net/manual/en/class.mysqli-driver.php
* http://php.net/manual/en/mysqli-driver.report-mode.php
* http://php.net/manual/en/mysqli.constants.php
*/
$mysqliDriver = new mysqli_driver();
$mysqliDriver->report_mode = (MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
try {
// To delete (just for test here).
$get_info_id = 1;
$userId = $get_info_id;
$fetchedData = array();
/*
* Create the db connection.
*
* Throws mysqli_sql_exception.
* See: http://php.net/manual/en/mysqli.construct.php
*/
$connection = new mysqli(
MYSQL_HOST
, MYSQL_USERNAME
, MYSQL_PASSWORD
, MYSQL_DATABASE
, MYSQL_PORT
);
if ($connection->connect_error) {
throw new Exception('Connect error: ' . $connection->connect_errno . ' - ' . $connection->connect_error);
}
/*
* The SQL statement to be prepared. Notice the so-called markers,
* e.g. the "?" signs. They will be replaced later with the
* corresponding values when using mysqli_stmt::bind_param.
*
* See: http://php.net/manual/en/mysqli.prepare.php
*/
$sql = 'SELECT
cnv.offer_name,
cnv.time,
cnv.payout
FROM conversions AS cnv
LEFT JOIN users AS usr ON usr.affsub = cnv.affsub
WHERE usr.id = ?';
/*
* Prepare the SQL statement for execution.
*
* Throws mysqli_sql_exception.
* See: http://php.net/manual/en/mysqli.prepare.php
*/
$statement = $connection->prepare($sql);
if (!$statement) {
throw new Exception('Prepare error: ' . $connection->errno . ' - ' . $connection->error);
}
/*
* Bind variables for the parameter markers (?) in the
* SQL statement that was passed to mysqli::prepare. The first
* argument of mysqli_stmt::bind_param is a string that contains one
* or more characters which specify the types for the corresponding bind variables.
*
* See: http://php.net/manual/en/mysqli-stmt.bind-param.php
*/
$bound = $statement->bind_param('i', $userId);
if (!$bound) {
throw new Exception('Bind error: The variables could not be bound to the prepared statement');
}
/*
* Execute the prepared SQL statement.
* When executed any parameter markers which exist will
* automatically be replaced with the appropriate data.
*
* See: http://php.net/manual/en/mysqli-stmt.execute.php
*/
$executed = $statement->execute();
if (!$executed) {
throw new Exception('Execute error: The prepared statement could not be executed!');
}
/*
* Transfer the result set resulted from executing the prepared statement.
* E.g. store, e.g. buffer the result set into the (same) prepared statement.
*
* See:
* http://php.net/manual/en/mysqli-stmt.store-result.php
* https://stackoverflow.com/questions/8321096/call-to-undefined-method-mysqli-stmtget-result
*/
$resultStored = $statement->store_result();
if (!$resultStored) {
throw new Exception('Store result error: The result set could not be transfered');
}
/*
* Get the number of rows from the prepared statement.
*
* See: http://php.net/manual/en/mysqli-stmt.num-rows.php
*/
$numberOfRows = $statement->num_rows;
/*
* Fetch data and save it into $fetchedData array.
*
* See: http://php.net/manual/en/mysqli-result.fetch-array.php
*/
if ($numberOfRows > 0) {
/*
* Bind the result set columns to corresponding variables.
* E.g. these variables will hold the column values after fetching.
*
* See: http://php.net/manual/en/mysqli-stmt.bind-result.php
*/
$varsBound = $statement->bind_result(
$resOfferName
, $resTime
, $resPayout
);
if (!$varsBound) {
throw new Exception('Bind result error: The result set columns could not be bound to variables');
}
/*
* Fetch results from the result set (of the prepared statement) into the bound variables.
*
* See: http://php.net/manual/en/mysqli-stmt.fetch.php
*/
while ($row = $statement->fetch()) {
$fetchedObject = new stdClass();
$fetchedObject->offer_name = $resOfferName;
$fetchedObject->time = $resTime;
$fetchedObject->payout = $resPayout;
$fetchedData[] = $fetchedObject;
}
}
/*
* Frees the result memory associated with the statement,
* which was allocated by mysqli_stmt::store_result.
*
* See: http://php.net/manual/en/mysqli-stmt.store-result.php
*/
$statement->free_result();
/*
* Close the prepared statement. It also deallocates the statement handle.
* If the statement has pending or unread results, it cancels them
* so that the next query can be executed.
*
* See: http://php.net/manual/en/mysqli-stmt.close.php
*/
$statementClosed = $statement->close();
if (!$statementClosed) {
throw new Exception('The prepared statement could not be closed!');
}
// Close db connection.
$connectionClosed = $connection->close();
if (!$connectionClosed) {
throw new Exception('The db connection could not be closed!');
}
} catch (mysqli_sql_exception $e) {
echo 'Error: ' . $e->getCode() . ' - ' . $e->getMessage();
exit();
} catch (Exception $e) {
echo $e->getMessage();
exit();
}
/*
* Disable internal report functions.
*
* MYSQLI_REPORT_OFF: Turns reporting off.
*
* See:
* http://php.net/manual/en/class.mysqli-driver.php
* http://php.net/manual/en/mysqli-driver.report-mode.php
* http://php.net/manual/en/mysqli.constants.php
*/
$mysqliDriver->report_mode = MYSQLI_REPORT_OFF;
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Example code: Mysqli prepared statements & exception handling</title>
</head>
<style>
table {
font-family: "Verdana", Arial, sans-serif;
font-size: 14px;
border-collapse: collapse;
}
table, th, td {
border: 1px solid #ccc;
}
th, td {
padding: 7px;
}
thead {
color: #fff;
font-weight: normal;
background-color: coral;
}
tfoot {
background-color: wheat;
}
tfoot td {
text-align: right;
}
</style>
<body>
<?php
$countOfFetchedData = count($fetchedData);
if ($countOfFetchedData > 0) {
?>
<table>
<thead>
<tr>
<th>Crt. No.</th>
<th>OFFER NAME</th>
<th>TIME</th>
<th>PAYOUT</th>
</tr>
</thead>
<tbody>
<?php
foreach ($fetchedData as $key => $item) {
$offerName = $item->offer_name;
$time = $item->time;
$payout = $item->payout;
?>
<tr>
<td><?php echo $key + 1; ?></td>
<td><?php echo $offerName; ?></td>
<td><?php echo $time; ?></td>
<td><?php echo $payout; ?></td>
</tr>
<?php
}
?>
</tbody>
<tfoot>
<tr>
<td colspan="7">
- <?php echo $countOfFetchedData; ?> records found -
</td>
</tr>
</tfoot>
</table>
<?php
} else {
?>
<span>
No records found.
</span>
<?php
}
?>
</body>
</html>