<?php
//index.php
session_start();
if (isset($_SESSION['username'])) {
header('Location: Pro_Lesson.php');
}
if (isset($_POST['username'], $_POST['password'])){
if(empty($_POST['username']) || empty( $_POST['password'])){
echo "username or password are empty";
}else {
header('Location: login.php');
}
}
?>
<html>
<head>
</head>
<body>
<h3>User Login</h3>
<table border="0">
<form method="POST" action="index.php">
<tr><td>Username</td><td>:</td><td><input type="text" name="username" size="20"></td></tr>
<tr><td>Password</td><td>:</td><td><input type="password" name="password" size="20"></td></tr>
<tr><td> </td><td> </td><td><input type="submit" value="Login"></td></tr>
</form>
</table>
</body>
</html>
成功验证用户名和密码后,如何将表单数据发布到另一个 php 页面?它安全吗?