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Homephp教程php手册php中cookie的使用方法

这篇文章主要介绍了php中cookie的使用方法,包括创建/更新cookie、删除cookie、取cookie值等用法,需要的朋友可以参考下

1.创建/更新cookie

复制代码 代码如下:


setCookie($cookieName,$value,time()+秒数);

例子:创建一个cookie,名字为UserName,值为zs,过期时间为2个星期

复制代码 代码如下:


setcookie("UserName","zs",time()+2*7*24*3600);

如果不设置时间,,就不会保存到cookie文件中。浏览器不关时,能够访问。当浏览器关闭时,就无法访问了。

例子:

复制代码 代码如下:


setcookie("Age","18");

2.取cookie的值

复制代码 代码如下:


$_cookie[$cookieName];

例子:取出UserName的值,放在变量$uName中

复制代码 代码如下:


$uName=$_COOKIE['UserName'];

取值的时候,一般会先判断是否为空,再进行取值操作。上面的取值操作一般这样写:

复制代码 代码如下:


if (!empty($_COOKIE['UserName']))
{

$uName=$_COOKIE['UserName'];

}

3.删除指定cookie

复制代码 代码如下:


setcookie($cookieName,value,time()-秒数);
//或者
setcookie($cookiename, '');
//或者
setcookie($cookiename, NULL);


例子:删除UserName

复制代码 代码如下:


setcookie("UserName","zs",time()-3600);

4.删除当前会话的所有cookie

复制代码 代码如下:


foreach($_COOKIE as $key=>$val){
setcookie($key,"",time()-100);
}

当无cookie时,本机保存cookie的文件也将删除。

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