php,js清除cookie

目的通过控制cookie中的是否有莫个值实现是否跳转重定向

http方式

<?php

if ($_COOKIE['test'] == 1) {
 　　echo 'have cookie test';
　　unset($_COOKIE['test']);
　　setcookie('test', '', time() - 360000, '/');
　　unset($_COOKIE['test']);

　　header('Location:/http/test.php');
} else {
　　setcookie('test', 1, time()+ 3600, '/');
　　echo 'set cookie';
}

js方式

window.onload = function(){
　　alert(getCookie('test'));
　　clearCookie('test');
　　window.location = "/http/test.php";
}
function setCookie(cname, cvalue, exdays) {
　　var d = new Date();
　　d.setTime(d.getTime() + (exdays*24*60*60*1000));
　　var expires = "expires="+d.toUTCString();
　　document.cookie = cname + "=" + cvalue + "; " + expires + "; path=/"; #注意cookie的域 默认是当前路径
}
//清除cookie
function clearCookie(name) {
　　setCookie(name, "", -1000);
}
//获取cookie
function getCookie(cname) {　　
　　var name = cname + "=";
　　var ca = document.cookie.split(';');
　　for(var i=0; i<ca.length; i++) {
　　　　var c = ca[i];
　　　　while (c.charAt(0)==' ') c = c.substring(1);
　　　　if (c.indexOf(name) != -1) return c.substring(name.length, c.length);
　　}
　　return "";
}
</script>';