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php中setcookie() 函数用法介绍

时间：2015-01-23 来源：西部数据作者：西部数据

setcookie() 函数是php中一个用来设置cookie值的一个函数,下面我来总结一下setcookie() 函数的具体用法以及设置之后怎么获取cookie的值.

setcookie() 函数向客户端发送一个 HTTP cookie.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.

cookie 的名称指定为相同名称的变量.例如,如果被发送的 cookie 名为 "name",会自动创建名为 $user 的变量,包含 cookie 的值.

必须在任何其他输出发送前对 cookie 进行赋值.如果成功,则该函数返回 true,否则返回 false.

语法

setcookie(name,value,expire,path,domain,secure)

实例代码如下:

makecookie('111','www.111cn.net');

//清除cookie

clearcookies();

//下面兴一个支持二级域名cookie函数吧.

function setcookielive($name, $value='', $expire=0, $path='', $domain='', $secure=false, $httponly=false) {

    //set a cookie as usual, but also add it to $_cookie so the current page load has access

    $_cookie[$name] = $value;

    return setcookie($name,$value,$expire,$path,$domain,$secure,$httponly);

}

//调用方法

setcookielive('webab','111cn',time()+86000,'/','111cn.net');

//一入门级cookie设置方法

setcookie("cookie[three]", "cookiethree");

setcookie("cookie[two]", "cookietwo");

setcookie("cookie[one]", "cookieone");

// after the page reloads, print them out

if (isset($_cookie['cookie'])) {

    foreach ($_cookie['cookie'] as $name => $value) {

        echo "$name : $value <br />n";

    }

}

js获取 cookie方法实例代码如下:

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Insert title here</title>

</head>

<body>

<script type="text/javascript">

//get cookie

function getCookie(name) {

     var nameEQ = name + "=";

     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,c.length);

         }

         if (c.indexOf(nameEQ) == 0) {

             return unescape(c.substring(nameEQ.length,c.length));

         }

     }

     return false;

}

//clear cookie

function clearCookie(name) {

    setCookie(name, "", -1);

}

//set cookie

function setCookie(name, value, seconds) {

     seconds = seconds || 0;

     var expires = "";

     if (seconds != 0 ) {

         var date = new Date();

         date.setTime(date.getTime()+(seconds*1000));

         expires = "; expires="+date.toGMTString();

     }

     document.cookie = name+"="+escape(value)+expires+"; path=/";

}

alert(getCookie('test2'));

</script>

</body>

</html>