engelsystem/includes/model/Message_model.php

<?php

/**
 * Returns Message id array
 */
function mMessageList() {
	$message_source = sql_select("SELECT `id` FROM `Messages`");
	if ($message_source === false)
		return false;
	if (count($message_source) > 0)
		return $message_source;
	return null;
}

/**
 * Returns message by id.
 *
 * @param $id message ID
 */
function mMessage($id) {
	$message_source = sql_select("SELECT * FROM `Messages` WHERE `id`=" . sql_escape($id) . " LIMIT 1");
	if ($message_source === false)
		return false;
	if (count($message_source) > 0)
		return $message_source[0];
	return null;
}


/**
 * send message
 *
 * @param $id User ID of Reciever
 * @param $text Text of Message
 */
function mMessage_Send($id, $text) {
	global $user;
	
  $text = preg_replace("/([^\p{L}\p{P}\p{Z}\p{N}\n]{1,})/ui", '', strip_tags($text));
  $to = preg_replace("/([^0-9]{1,})/ui", '', strip_tags( $id));

  if (($text != "" && is_numeric($to)) && 
      (sql_num_query("SELECT * FROM `User` WHERE `UID`=" . sql_escape($to) . " AND NOT `UID`=" . sql_escape($user['UID']) . " LIMIT 1") > 0) ) {
    sql_query("INSERT INTO `Messages` SET `Datum`=" . sql_escape(time()) . ", `SUID`=" . sql_escape($user['UID']) . ", `RUID`=" . sql_escape($to) . ", `Text`='" . sql_escape($text) . "'");
    return true;
  } else {
    return false;
  }
 }

?>