PHP Globals.php for installer

<?php
    if(file_exists(dirname(__FILE__).'/lock')){
        $errorCode = "SBBCE2";
        $errorMessage = "[Simple Bulletin Board Custom Error #2] Installer Locked";
        $errorFile = "Installer Directory";
        $errorLine = "ALL";
        include(dirname(dirname(__FILE__))."/includes/error.php");
    }
    if(!file_exists(dirname(dirname(__FILE__)).'/includes/config.php')){
        $errorCode = "SBBCE1";
        $errorMessage = "[Simple Bulletin Board Custom Error #1] Config not Found!";
        $errorFile = "Installer Directory";
        $errorLine = "ALL";
        include(dirname(dirname(__FILE__))."/includes/error.php");
    }

    if(!file_exists(dirname(dirname(__FILE__)).'/includes/functions_class.php')){
        $errorCode = "SBBCE4";
        $errorMessage = "[Simple Bulletin Board Custom Error #4] Functions not Found!";
        $errorFile = "Installer Directory";
        $errorLine = "ALL";
        include(dirname(dirname(__FILE__))."/includes/error.php");
    }

    if(!file_exists(dirname(dirname(__FILE__)).'/includes/mysql_database_pdo_class.php')){
        $errorCode = "SBBCE3";
        $errorMessage = "[Simple Bulletin Board Custom Error #3] Database class not Found!";
        $errorFile = "Installer Directory";
        $errorLine = "ALL";
        include(dirname(dirname(__FILE__))."/includes/error.php");
    }

        require(dirname(dirname(__FILE__)).'/includes/config.php');
        require(dirname(dirname(__FILE__)).'/includes/functions_class.php');
        require(dirname(dirname(__FILE__)).'/includes/mysql_database_pdo_class.php');
?>