if (mysql_result(mysql_query("SELECT COUNT(*) FROM `users_count` WHERE `id_user` = '".$user['id']."'"), 0) == 0){ //code }
$db = new mysqli('host','user', 'password','db'); if ($db->query("SELECT COUNT(*) FROM `users_count` WHERE `id_user` = '".$user['id']."'")->num_rows == 0){ //code }