//添加cookie
setcookie("name","zxf",time()+3600);

//数组
$arr = array(1,2,3); 
$arr_str = serialize($arr); 
setcookie("a",$arr_str,time()+3600); 
 
//获取cookie
var_dump($_COOKIE);
 
//更新cookie
setcookie("name","aaa",time()+3600);
 
//删除cookie
setcookie("name","",time()-20);
 
//删除所有
foreach ($_COOKIE as $key => $value) {
 setcookie($key,"",time()-1);
 }
echo "成功";

//取cookie
$_COOKIE['UserName'];