mercuryboard has exited with an error


mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead

Unknown Error [8192]:
The error was reported on line 63 of /var/www/nerczyca.poczta.rpl.pl/forum/lib/mysql.php

Code:
61         $this->socket = $db_socket;
62
63         $this->connection = mysql_connect("$db_host:$db_port" . (!$this->socket ? '' : ":$db_socket"), $db_user, $db_pass);
64
65         if (!mysql_select_db($db_name, $this->connection)) {



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