我是Web开发的新手，想要制作一个简单的登录表单，尽管不确定为什么我的登录按钮没有响应，用户需要输入他们的电子邮件和密码。 用户输入密码后，登录按钮不起作用。
<?php
session_start();
if(isset($_POST['submit'])) {
include_once("php/config/database.php");
$Email = strip_tags($_POST['Email']);
$dbPassword = strip_tags($_POST['Password']);
$Email = stripslashes($Email);
$dbPassword = stripslashes($dbPassword);
$Email = mysqli_real_escape_string($conn, $Email);
$dbPassword = mysqli_real_escape_string($conn, $dbPassword);
$dbPassword = md5($dbPassword);
$sql = ("SELECT * FROM 'Users' WHERE Email='$Email' LIMIT 1");
$query = mysqli_query($conn, $sql);
$row = mysqli_fetch_array($query);
$UserID = $row['UserID'];
$dbpass_Password = $row['Password'];
if($dbPassword == $dbpass_Password) {
$_SESSION['Email'] = $Email;
$_SESSION['UserID'] = $UserID;
header("Location: account.php");
}
else
{
echo "You didn't enter the correct details!";
}
}
?>
<html >
<head>
<meta charset="UTF-8">
<title>background</title>
<link rel="stylesheet" href="css/style.css">
<script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>
<script src="js/index.js"></script>
</head>
<body>
<div class="container demo-1">
<div class="content">
<div id="large-header" class="large-header">
<form action="index.php" method="POST>
<div class="box">
<h1 id="logintoregister">Login</h1>
<div class="group show">
<input class="inputMaterial" type="text" name="FirstName" >
<span class="highlight"></span>
<span class="bar"></span>
<label>First Name</label>
</div>
<div class="group show">
<input class="inputMaterial" type="text" name="Surname" >
<span class="highlight"></span>
<span class="bar"></span>
<label>Surname</label>
</div>
<div class="group ">
<input class="inputMaterial" type="email" name="Email" >
<span class="highlight"></span>
<span class="bar"></span>
<label>Email</label>
</div>
<div class="group">
<input class="inputMaterial" type="password" id="password" name="Password" >
<span class="highlight"></span>
<span class="bar"></span>
<label>Password</label>
</div>
<div class="group show">
<input class="inputMaterial" type="password" id="confirm_password" >
<span class="highlight"></span>
<span class="bar"></span>
<label>Confirm Password</label>
</div>
<button id="buttonlogintoregister" type = "submit" name="submit">Login</button>
<p id="plogintoregister">By registering, You accept all terms and conditons </p>
<p id="textchange" onclick="register()"> Sign Up</p>
</form>
<!-- Related demos -->
<script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>
<script src="js/index.js"></script>
</body>
</html>
你的 html 坏了：
<form action="index.php" method="POST" />
^---
您自行关闭表单标签，因此页面上的每个输入字段都在表单之外。
另外请注意，您还有其他逻辑错误：
if($Password == $dbpass_Password) {
^----
$password是用户PW的sql转义版本。如果该密码自然包含 SQL 元字符，则该密码将不会与数据库中的内容相等。这些转义在数据库插入过程中被剥离，您最终会执行类似
"Miles O''Brien" == "Miles O'Brien"
并返回错误的不匹配。