php setcookie介绍与实例应用
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。
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)
*/
$cookieinfo=session_get_cookie_params(); //获取cookie信息
if((empty($cookieinfo['domain']))&&(empty($cookieinfo['secure']))) //检查结果是否为空
{
setcookie(session_name(),'',time()-3600,$cookieinfo['path']); //设置cookie
}
elseif(empty($cookieinfo['secure'])) //检查选项是否为空
{
setcookie(session_name(),'',time()-3600,$cookieinfo['path'],$cookieinfo['domain']); //设置cookie
}
else
{
setcookie(session_name(),'',time()-3600,$cookieinfo['path'],$cookieinfo['domain'],$cookieinfo['secure']); //设置cookie
}
//session_destroy(); //注销session
print_r($_session);
print_r($_cookie);
//利用session_set_cookie_params可以设置生存期及路径
session_set_cookie_params(0,'/yourpath/'); //设置cookie的生存期及路径
/*
注释:可以通过 $http_cookie_vars["user"] 或 $_cookie["user"] 来访问名为 "user" 的 cookie 的值。
注释:在发送 cookie 时,cookie 的值会自动进行 url 编码。接收时会进行 url 解码。如果你不需要这样,可以使用 setrawcookie() 代替。
*/

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