为什么这只允许一种类型而不是两种？ PHP

I have created a page where modorators (group 2) can have their own page to show whats going on, banned users etc. I want admin (group 1) to be able to access the page as well. The function im using is:

function mod_protect() {
    global $user_data;
    if (has_access($user_data['user_id'], 1, 2) === false) {
        header('Location: index.php');
        exit();
    }
    }

when i use just the mods group number (2) it works fine but when i try to put both in only 1 works??

Sorry has_access code:

function has_access($user_id, $type) {
    $user_id    = (int)$user_id;
    $type       = (int)$type;

    return (mysql_result(mysql_query("SELECT COUNT(`user_id`) FROM `users` WHERE `user_id` = $user_id AND `type` = $type"), 0) == 1) ? true : false;
}

Based on your code, you could do this (though it would use two queries when one could easily be used - that is optimization for you to do though):

if (has_access($user_data['user_id'], 1) === false && has_access($user_data['user_id'], 2) === false) {
    header('Location: index.php');
    exit();
}

Might I suggest this as an alternative approach to your has_access() function:

function has_access($user_id, $type) {
  $user_id    = (int)$user_id;
  if( is_array( $type ) {
    $types = implode(',',$type);
    return (mysql_result(mysql_query("SELECT COUNT(`user_id`) FROM `users` WHERE `user_id` =      $user_id AND `type` IN ($types)"), 0) == 1) ? true : false;
  else {
    return (mysql_result(mysql_query("SELECT COUNT(`user_id`) FROM `users` WHERE `user_id` =      $user_id AND `type` = $type"), 0) == 1) ? true : false;
  }
}

Doing this way allows you to either pass a single type to the has_access() function or pass an array of types to the same function.