if($db->query("SELECT * FROM `mail_chat` WHERE `user_id` = '$user[id]' AND `who_id` = '". abs(intval($_GET['user_id']))."'")->rowCount()!=0) $chat_id = $db->query("SELECT id FROM `mail_chat` WHERE `user_id` = '$user[id]' AND `who_id` = '". abs(intval($_GET['user_id']))."'")->fetchColumn();
else $chat_id = $db->query("SELECT `id` FROM `mail_chat` WHERE `who_id` = '$user[id]' AND `user_id` = '". abs(intval($_GET['user_id']))."'")->fetchColumn();
if($db->query("SELECT * FROM `mail_chat` WHERE (`user_id` = '$user[id]' OR `who_id` = '$user[id]') AND (`who_id` = '". abs(intval($_GET['user_id']))."' OR `user_id` = '". abs(intval($_GET['user_id']))."')")->rowCount()==0){
$db->query("INSERT INTO `mail_chat` SET `user_id` = '$user[id]', `who_id` = '". abs(intval($_GET['user_id']))."', `time_last_message` = '". time()."'");
// print_r($db->errorInfo());
}
if(isset($_POST['send'])&& $_GET['act']=='send'){
$message = input($_POST['text']);
if(!empty($message)){ $text = substr($message,0,5000);}else{ $err ='Message is empty';}