สอบถามเรื่อง ไฟล์ connect database ครับ ... Warning: mysql_pconnect() has been disabled for security reasons

<?php
if (!isset($_COOKIE)) {
	session_start();
	ob_start();
}
/******************** for local ***********************/

function connect_db() {

$dbhost = 'localhost';
$dbuser = 'banmahat_db';
$dbpass = 'root';

	$result = mysql_pconnect($dbhost, $dbuser, $dbpass);
	return $result;
}

$dbname = 'banmahat_db';

$Conn = connect_db();
mysql_select_db ($dbname,$Conn) or die ("Can not select the database '$dbname' because: " . mysql_error());
$sql = "SET NAMES 'UTF8'";
$character = mysql_db_query($dbname,$sql);
?>