<?php

if (!function_exists('mysql_connect')) {

    $DB_CONNECTION = null;

    function mysql_connect ($host, $username, $password) {
        global $DB_CONNECTION;
        $DB_CONNECTION = mysqli_connect($host, $username, $password);
        return $DB_CONNECTION;
    }

    function mysql_pconnect ($server, $username, $password) {
        global $DB_CONNECTION;
        $DB_CONNECTION = mysqli_connect('p:'. $server, $username, $password);
        return $DB_CONNECTION;
    }

    function mysql_select_db ($database) {
        global $DB_CONNECTION;
        return mysqli_select_db($DB_CONNECTION, $database);
    }

    function mysql_query ($sql) {
        global $DB_CONNECTION;
        return mysqli_query($DB_CONNECTION, $sql);
    }

    function mysql_fetch_array ($result) {
        return mysqli_fetch_array($result);
    }

    function mysql_fetch_row ($result) {
        return mysqli_fetch_row($result);
    }

    function mysql_fetch_assoc ($result) {
        return mysqli_fetch_assoc($result);
    }

    function mysql_num_rows ($result) {
        return mysqli_num_rows($result);
    }

    function mysql_real_escape_string ($escapestr)
    {
        global $DB_CONNECTION;
        return mysqli_real_escape_string($DB_CONNECTION, $escapestr);
    }

    function mysql_close ()
    {
        global $DB_CONNECTION;
        return mysqli_close($DB_CONNECTION);
    }

    function mysql_free_result ($result)
    {
        return mysqli_free_result($result);
    }
}