使用PHP在页面上显示MySQL数据库中的信息
我有一个叫做test的数据库。里面有一张叫“人”的桌子。人有4个字段：fname、lname、age、city。我有一个带有表单的页面，人们可以在其中输入数据使用PHP在页面上显示MySQL数据库中的信息,php,mysql,database,web-deployment,Php,Mysql,Database,Web Deployment,我有一个叫做test的数据库。里面有一张叫“人”的桌子。人有4个字段：fname、lname、age、city。我有一个带有表单的页面，人们可以在其中输入数据 <?php include('header.php'); ?> <body> <form action="getinformation.php" method="post" id="getinformation"> <div id="header"> <h1><stron
<?php
include('header.php');
?>
<body>
<form action="getinformation.php" method="post" id="getinformation">
<div id="header">
<h1><strong>Search For Data</h1></strong>
</div>
<div id="main">
<table border="0" width="75%">
<tr>
<td align="right" width="10%">First Name: </td>
<td><input type="text" name="fname" id="fname" size="20" /></td>
</tr>
<tr>
<td align="right" width="10%">Last Name: </td>
<td><input type="text" name="lname" id="lname" size="20" /></td>
</tr>
<tr>
<td align="right" width="10%">Age: </td>
<td><input type="text" name="age" id="age" size="3" /></td>
</tr>
<tr>
<td align="right" width="10%">City: </td>
<td><input type="text" name="city" id="city" size="20" /></td>
</tr>
</table>
<input type="submit" />
</div>
</body>
<?php
include('footer.php');
?>
我以前在使用isset函数时遇到过这个问题，但除此之外，我想知道代码的其余部分是否正常（假设isset工作正常）您有一个语法错误-缺少右括号：
if (isset ($POST_fname) {
if (isset ( ..... ) ) {
出现语法错误-缺少右括号：
if (isset ($POST_fname) {
if (isset ( ..... ) ) {
<?php
require_once('model.php');
$query = "SELECT * FROM people WHERE";
if (isset ($POST_fname)) {
$fname = $_POST['fname'];
$query = $query . " fname = '" . $fname . "' AND";
}
if (isset ($POST_lname)) {
$lname = $_POST['lname'];
$query = $query . " lname = '" . $lname . "' AND";
}
if (isset ($POST_age)) {
$age = $_POST['age'];
$query = $query . " age = '" . $age . "' AND";
}
if (isset ($POST_city)) {
$city = $_POST['city'];
$query = $query . " city = '" . $city . "' AND";
}
$query = rtrim($query, " AND");
?>
<div id=/"header/">
<h1><strong>This is the information you requested</h1></strong>
</div>
<div id=/"main/">
<?php
$statement = $db->prepare($query);
$statement->execute();
$products = $statement->fethAll();
$statement->closeCursor();
foreach ($products as $product) {
echo $product['fname'] . " " . $product['lname'] . " | " . $product['age'] . " | " . $product['city'] . '<br />';
}
?>
</div>
<?php
include('footer.php');
?>
<?php
require_once('model.php');
$query = "SELECT * FROM people WHERE";
if (isset ($POST_fname)) {
$fname = $_POST['fname'];
$query = $query . " fname = '" . $fname . "' AND";
}
if (isset ($POST_lname)) {
$lname = $_POST['lname'];
$query = $query . " lname = '" . $lname . "' AND";
}
if (isset ($POST_age)) {
$age = $_POST['age'];
$query = $query . " age = '" . $age . "' AND";
}
if (isset ($POST_city)) {
$city = $_POST['city'];
$query = $query . " city = '" . $city . "' AND";
}
$query = rtrim($query, " AND");
?>
<div id=/"header/">
<h1><strong>This is the information you requested</h1></strong>
</div>
<div id=/"main/">
<?php
$statement = $db->prepare($query);
$statement->execute();
$products = $statement->fethAll();
$statement->closeCursor();
foreach ($products as $product) {
echo $product['fname'] . " " . $product['lname'] . " | " . $product['age'] . " | " . $product['city'] . '<br />';
}
?>
</div>
<?php
include('footer.php');
?>
if(isset(anything))
if(isset(anything))
还有什么问题，来这里吧！遗漏了大量的
；isset（$POST\u fname）isset（$\u POST['fname'））；isset（$POST_fname）isset（$\u POST['fname'））想知道代码的其余部分是否看起来很好