PHP 登录记住密码实现思路

form页面

<form action="login.php" method="post"> 
用户名<input type="text" name="username"><br> 
密码<input type="text" name="password"><br> 
记住密码<input type="checkbox" name="jizhu" value="1"><br> 
<input type="submit"> 
</form> 
<a href="userinfo.php">用户信息</a> 
<?php 
session_start(); 
function p($arr){ 
echo "<pre>"; 
print_r($arr); 
echo "</pre>"; 
} 
p($_SESSION); 
p($_COOKIE); 
?>

登录页面

<?php 
function p($arr){ 
echo "<pre>"; 
print_r($arr); 
echo "</pre>"; 
} 
session_start(); 
//p($_POST); 
$_SESSION['username'] = $_POST['username']; 
$_SESSION['password'] = $_POST['password']; 
if($_POST['jizhu']){ 
setcookie('username',$_POST['username'],time()+60); 
setcookie('password',$_POST['password'],time()+60); 
} 
header("location:form.php");

用户信息页面

<?php 
session_start(); 
echo "先关闭浏览器，在访问form.php 试试，然后 点推出在关闭浏览器试试"; 
p($_SESSION); 
p($_COOKIE); 
if(empty($_SESSION['username'])){ 
if(empty($_COOKIE['username'])){ 
echo "<a href='form.php'>请先登录</a>";exit; 
}else{ 
$_SESSION['username'] = $_COOKIE['username']; 
} 
} 
function p($arr){ 
echo "<pre>"; 
print_r($arr); 
echo "</pre>"; 
} 
?> 
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<a href="updateuserinfo.php">修改信息</a> 
<a href="logout.php">推出</a>

推出页面

<?php 
session_start(); 
unset($_SESSION['username']); 
unset($_SESSION['password']); 
setcookie('username','',0); 
setcookie('password','',0); 
header("location:form.php"); 
?>

修改用户信息页面

<?php 
session_start(); 
if(empty($_SESSION['username'])){ 
echo "请先登录"; 
}else{ 
echo "这里是信息"; 
} 
?>