Debug On Screen, restricted by Ip Address, several vars at once, using var_dump() or print_r()

debug_vars.php

<?php

/**
 * @author  Exadra37     <exadra37atgmailpointcom>
 * @since   2014/01/03
 */

if (!function_exists('debugOnScreen')) {

    function debugOnScreen(array $vars, $print_r = false, $die = false)
    {
        $remote_ip_address = $_SERVER['REMOTE_ADDR'];

        $dev_ip_address = array('123.45.67.89'); // allowed ip addresses

        if (in_array($remote_ip_address, $dev_ip_address)) {
            foreach ($vars as $key => $var) {

                $var_name = (is_int($key)) ? 'Undefined Var Name' : $key;

                echo "<hr>{$var_name}<pre>";

                if ($print_r) {
                    print_r($var)
                } else {
                    var_dump($var);
                }   

                echo "</pre><hr>";
            }

            if ($die) {
                die();
            }
            return true;
        }
        return false;
    }
}

if (!function_exists('prvars')) {

    function prvars(array $vars) {

        debugOnScreen($vars, true, false);
    }
}

if (!function_exists('vdvars')) {

    function vdvars(array $vars) {

        debugOnScreen($vars, false, false);
    }
}

if (!function_exists('dprvars')) {

    function dprvars(array $vars) {

        debugOnScreen($vars, true, true);
    }
}

if (!function_exists('dvdvars')) {

    function dvdvars(array $vars) {

        debugOnScreen($vars, false, true);
    }
}