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虽然同样的概念正在其他形式的登录功能，我无法这样做。帮我登录并注册。无法执行此操作。这里是登录和注册表格以及hlater login.php页面的代码，用于登录和注册数据库。所有细节都在代码中。并善意报告错误和进一步的修改要求。在此先感谢：无法登录使用PHP
<!DOCTYPE html>
<!--[if lt IE 7 ]> <html lang="en" class="no-js ie6 lt8"> <![endif]-->
<!--[if IE 7 ]> <html lang="en" class="no-js ie7 lt8"> <![endif]-->
<!--[if IE 8 ]> <html lang="en" class="no-js ie8 lt8"> <![endif]-->
<!--[if IE 9 ]> <html lang="en" class="no-js ie9"> <![endif]-->
<!--[if (gt IE 9)|!(IE)]><!--> <html lang="en" class="no-js"> <!--<![endif]-->
<head>
<meta charset="UTF-8" />
<!-- <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> -->
<title>Login and Registration Form T & P Cell</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="Login and Registration Form with HTML5 and CSS3" />
<meta name="keywords" content="html5, css3, form, switch, animation, :target, pseudo-class" />
<meta name="author" content="Codrops" />
<link rel="shortcut icon" href="../favicon.ico">
<link rel="stylesheet" type="text/css" href="css/demo.css" />
<link rel="stylesheet" type="text/css" href="css/style.css" />
<link rel="stylesheet" type="text/css" href="css/animate-custom.css" />
</head>
<body>
<div class="container">
<!-- Codrops top bar -->
<div class="codrops-top">
<span class="right">
</span>
</div><!--/ Codrops top bar -->
<section style=" height: 480px">
<div id="container_demo" >
<a class="hiddenanchor" id="toregister"></a>
<a class="hiddenanchor" id="tologin"></a>
<div id="wrapper">
<div id="login" class="animate form" style=" height: 270px">
<form action="login.php" method="POST" autocomplete="on">
<h1>Log in</h1>
<p>
<label for="username" class="uname" data-icon="u" > Your email or username </label>
<input id="username" name="username" required="required" type="text" />
</p>
<p>
<label for="password" class="youpasswd" data-icon="p"> Your password </label>
<input id="password" name="password" required="required" type="password" />
</p>
<p class="keeplogin">
<input type="checkbox" name="loginkeeping" id="loginkeeping" value="loginkeeping" />
<label for="loginkeeping">Keep me logged in</label>
</p>
<p class="login button" style="float: left">
Not a member? <a href="#toregister" class="to_register" > Join Us </a>
</p>
<p class="login button">
<input type="submit" value="Login" />
</p>
</form>
</div>
<div id="register" class="animate form" style=" height: 400px">
<form action="mysuperscript.php" autocomplete="on">
<h1> Sign up </h1>
<p>
<label for="usernamesignup" class="uname" data-icon="u"> Full name</label>
<input id="usernamesignup" name="usernamesignup" required="required" type="text" />
</p>
<p>
<label for="emailsignup" class="youmail" data-icon="e" > Your email</label>
<input id="emailsignup" name="emailsignup" required="required" type="email" />
</p>
<p>
<label for="passwordsignup" class="youpasswd" data-icon="p">Your password </label>
<input id="passwordsignup" name="passwordsignup" required="required" type="password" />
</p>
<p>
<label for="passwordsignup_confirm" class="youpasswd" data-icon="p">Please confirm your password </label>
<input id="passwordsignup_confirm" name="passwordsignup_confirm" required="required" type="password"/>
</p>
<p class="login button" style="float: left">
Already a member ?
<a href="#tologin" class="to_register"> Go and log in </a>
</p>
<p class="signin button">
<input type="submit" value="Sign up"/>
</p>
</form>
</div>
</div>
</div>
</section>
</div>
</body>
</html>
<?php
session_start(); // Starting Session
$error = ''; // Variable To Store Error Message
if (isset($_POST['submit'])) {
echo "string6";
if (empty($_POST['username']) || empty($_POST['password'])) {
echo "gh";
$error = "Username or Password is invalid";
} else {
echo "asdfgh";
// Define $username and $password
$username = $_POST['username'];
$password = $_POST['password'];
// Establishing Connection with Server by passing server_name, user_id and password as a parameter
$connection = mysqli_connect("localhost", "root", "");
// To protect MySQL injection for Security purpose
$username = stripslashes($username);
$password = stripslashes($password);
$username = mysqli_real_escape_string($username);
$password = mysqli_real_escape_string($password);
// Selecting Database
$db = mysqli_select_db("tandp_db", $connection);
// SQL query to fetch information of registerd users and finds user match.
$query = mysqli_query("select * from login where password='$password' AND username='$username'", $connection);
$rows = mysqli_num_rows($query);
if ($rows == 1) {
$_SESSION['login_user'] = $username; // Initializing Session
header("location:login.html"); // Redirecting To Other Page
} else {
$error = "Username or Password is invalid";
}
mysqli_close($connection); // Closing Connection
}
}
?>
什么是错误？ –
可能'标题已发送'？ – DevDonkey
其实.. PHP代码不工作...意味着无法执行任何PHP操作 –