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php之函数setcookie

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Jun 23, 2016 pm 02:30 PM

setcookie可以设置cookie, 不过在php设置的cookie页面第一次不能获得, 必须刷新一下,第二次才能获得.

这是因为cookie的原理:

$_COOKIE数组是从客户端返回的变量cookie值, 所以页面第一次执行时, 客户端的cookie值还没有

刷新后第二次执行已经有服务器传递的值了,所以可以获取到.

有一种变通的方法, 可以使得cookie值不需要刷新第一次就能生效, 其实就是给$_COOKIE数组赋值. 代码如下:

<?php    function newcookie($var, $value='', $time=0, $path='', $domain=''){    $_COOKIE[$var] = $value;    if(is_array($value)){        foreach($value as $k=>$v){            setcookie($var.'['.$k.']', $v, $time, $path, $domain, $s);        }    }else{        setcookie($var, $value, $time, $path, $domain, $s);    }}// var_dump($_COOKIE);?>

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