login.php
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>用戶登錄</title>
</head>
<body>
<form action="demo1.php" method="post">
用戶名：<input type="text" name="username"/><br>
密 碼：<input type="password" name="password"/><br>
<input type="submit" name="login" value="提交"/>
</form>
</body>
</html>demo1.php
<?php
session_start(); // 使用session回話必須調用session_start()
/*
* 獲取登錄名和密碼並保持到session中
*/
// 用戶是否提交
// 是否爲空值
// 不爲空，保存到session中
if(isset($_POST['login'])){
$username = $_POST['username'];
$password = $_POST['password'];
if($username != "" && $password != ""){
$_SESSION['username'] = $username;
$_SESSION['password'] = $password;
echo "<script type='text/javascript'>";
echo "location.href='result.php'";
echo "</script>";
}else {
echo "<script type='text/javascript'>";
echo "location.href='login.php'";
echo "</script>";
}
}else {
echo "<script type='text/javascript'>";
echo "location.href='login.php'";
echo "</script>";
}
?>result.php
<?php
session_start();
header('Content-Type:text/html;charset=utf-8');
echo "用戶名：".$_SESSION['username']."<br/>";
echo "密 碼：".$_SESSION['password']."<br/>";
/* unset() 和session_destory()使用
*
* unset() 銷燬一個session對象
* session_destory 銷燬所有的session對象
*
* */
unset($_SESSION['username']);
echo isset($_SESSION['username']).'<br/>';
echo isset($_SESSION['password']);
?>保
// cookie與session的區別 // cookie與session主要的區別在於：cookie主要保存在客戶端，而session保存/在服務器端。cookie一般用戶保存登錄名或購物車比較多，而session用戶保存後臺管理員的比較多