cookie不刷新页面立即生效

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);
 }
}