利用cookie实现用户自动登录的代码
cookie 是由服务器发送到浏览器的变量,cookie 通常是服务器嵌入到用户计算机中的小文本文件,每当计算机通过浏览器请求一个页面,就会发送这个 cookie,实例代码如下:
<?php
echo ("Cookie created? : " . setcookie("cookie_name", "cookie_data"));
?>
<html>
<head>
<title>Cookie</title>
</head>
<body>
</body>
</html>如果要删除 cookie只要设置cookie的过期时间就行了,实例代码如下:
<?php
setcookie("cookie_user", "test", time() + 60 * 60 * 24 * 30);
setcookie("cookie_pass", md5("test") , time() + 60 * 60 * 24 * 30);
function logout() {
setcookie("cookie_user", "", time() + 60 * 60 * 24 * 30);
setcookie("cookie_pass", "", time() + 60 * 60 * 24 * 30);
}
logout();
echo $_COOKIE['cookie_user'] . "<br />";
echo "You have successfully logged out.";
?>我们在开发中经常会用到cookie自动登录,实例代码如下:
<?php
$GLOBALS['username'] = "test";
$GLOBALS['password'] = "test";
function validatelogin($username, $password) {
if (strcmp($username, $GLOBALS['username']) == 0 && strcmp($password, $GLOBALS['password']) == 0) {
setcookie("cookie_user", $username, time() + 60 * 60 * 24 * 30);
setcookie("cookie_pass", md5($password) , time() + 60 * 60 * 24 * 30);
return true;
} else {
return false;
}
}
if (validatelogin("test", "test")) {
echo "Successfully logged in.";
} else {
echo "Sorry, invalid login.";
}
?>本文地址：http://www.phprm.com/huihua/fs4156.html
转载随意，但请附上文章地址:-)