让PHP COOKIE立即生效,不用刷新就可以使用

//PHP COOKIE设置函数立即生效。 
function cookie($var, $value='', $time=0, $path='', $domain=''){ 
$_COOKIE[$var] = $value; 
if(is_array($value)){ 
foreach($value as $k=>$v){ 
setcookie($var.'['.$k.']', $v, $time, $path, $domain, $s); 
} 
}else{ 
setcookie($var, $value, $time, $path, $domain, $s); 
} 
}