SESSION实战
1.connect.php
实例
<?php
$db=[
'type'=>'mysql',
'host'=>'localhost',
'dbname'=>'test2',
'user'=>'root',
'pw'=>'root'
];
$dsn="{$db['type']}:={$db['host']};dbname={$db['dbname']}";
try{
$pdo=new PDO($dsn,$db['user'],$db['pw']);
}catch (PDOException $a){
die( '链接错误' .$a->getMessage());
}运行实例 »
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PHP手写代码:
2.index.php
实例
<?php
session_start();
if (isset($_SESSION['name'])) {
echo '用户: ' . $_SESSION['name'] . '已登录<br>';
echo '<a href="dispatch.php?action=logout">退出</a>';
} else {
echo '<a href="dispatch.php?action=login">请登录</a>';
}运行实例 »
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PHP手写代码:
3.dispatch.php
实例
<?php
session_start();
require __DIR__ .'/connect.php';
$action=isset($_GET['action'])?$_GET['action']:'login';
$action=htmlentities(strtolower(trim($action)));
switch ($action){
case 'login':
include __DIR__ .'/login.php';
break;
case 'check':
include __DIR__ .'/check.php';
break;
case 'logout':
include __DIR__ .'/logout.php';
break;
default:
header('Location:index.php');
echo '<script>location.assign("index.php");</script>';
}运行实例 »
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PHP手写代码:
4.login.php
实例
<?php
session_start();
if (isset($_SESSION['name'])) {
echo '<script>alert("请不要重复登录");location.assign("index.php");</script>';
}
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>用户登录</title>
</head>
<body>
<h3>用户登录</h3>
<form action="dispatch.php?action=check" method="post">
<p>
<label for="phone">手机号:</label>
<input type="text" name="phone" id="phone">
</p>
<p>
<label for="password">密码:</label>
<input type="password" name="password" id="password">
</p>
<p>
<button>提交</button>
</p>
</form>
</body>
</html>运行实例 »
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PHP手写代码:
5.check.php
实例
<?php
session_start();
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
$phone = $_POST['phone'];
$password = md5($_POST['password']);
$sql = 'SELECT * FROM user WHERE phone = :phone AND pwd = :password LIMIT 1';
$stmt = $pdo->prepare($sql);
$stmt->execute(['phone'=>$phone,'password'=>$password]);
$user = $stmt->fetch(PDO::FETCH_ASSOC);
print_r($user);
if ($user === false) {
echo '<script>alert("验证失败");history.back();</script>';
die;
}
$_SESSION['name']=$user['name'];
echo '<script>alert("登录成功");location.assign("index.php");</script>';
exit;
} else {
die('请求类型错误');
}运行实例 »
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PHP手写代码:
6.logout.php
实例
<?php
if (isset($_SESSION['name'])) {
session_destroy();
echo '<script>alert("退出成功");location.assign("index.php");</script>';
} else {
echo '<script>alert("请先登录");location.assign("login.php");</script>';
}运行实例 »
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PHP手写代码:
