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Homephp教程php手册PHP setcookie()函数用法介绍

PHP setcookie()函数用法介绍

Jun 13, 2016 am 10:15 AM
cookiephpsessionsetcookieSameintroducefunctionexistusage

cookie就像是php中的session一样,只是一个在客户端一个是在服务器端了,下面我来详细介绍php中setcookie对cookie设置与删除代码。

setcookie()语法

setcookie (PHP 3, PHP 4, PHP 5)

setcookie -- 发送一个 cookie 信息

说明:bool setcookie ( string name [, string value [, int expire [, string path [, string domain [, bool secure]]]]] )

写cookie

 代码如下 复制代码

$value = 'something from somewhere';

setcookie("TestCookie", $value);
setcookie("TestCookie", $value, time()+3600);  /* expire in 1 hour */
setcookie("TestCookie", $value, time()+3600, "/~rasmus/", "example.com", 1);
?>

读cookie

 代码如下 复制代码

// Print an individual cookie
echo $_COOKIE["TestCookie"];
echo $HTTP_COOKIE_VARS["TestCookie"];

// Another way to debug/test is to view all cookies
print_r($_COOKIE);
?>


删除cookie

 代码如下 复制代码

// set the expiration date to one hour ago
setcookie ("TestCookie", "", time() - 3600);
setcookie ("TestCookie", "", time() - 3600, "/~rasmus/", "example.com", 1);
?>


由于cookie与HTTP的特定方式,你必须在你输出任何文本前,传送出所有的cookie。否则PHP会给出警告,并且cookie也不会被传送。因此,这样做是正确的:

 代码如下 复制代码

setcookie(’name’, ‘jeff’);

echo “Hello Everyone!”;

?>

以下是错误地:

 代码如下 复制代码

echo “Hello Everyone!”;

setcookie(’name’, ‘jeff’);

?>

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