db_setup.php

<?php
define( 'DVWA_WEB_PAGE_TO_ROOT', '' );
require_once DVWA_WEB_PAGE_TO_ROOT . 'dvwa/includes/dvwaPage.inc.php';

dvwaPageStartup( array( 'phpids' ) );

$page = dvwaPageNewGrab();
$page[ 'title' ]   = 'Setup' . $page[ 'title_separator' ].$page[ 'title' ];
$page[ 'page_id' ] = 'setup';

if( isset( $_POST[ 'create_db' ] ) ) {
        // Anti-CSRF
        if (array_key_exists ("session_token", $_SESSION)) {
                $session_token = $_SESSION[ 'session_token' ];
        } else {
                $session_token = "";
        }

        checkToken( $_REQUEST[ 'user_token' ], $session_token, 'setup.php' );

        if( $DBMS == 'MySQL' ) {
                include_once DVWA_WEB_PAGE_TO_ROOT . 'dvwa/includes/DBMS/MySQL.php';
        }
        elseif($DBMS == 'PGSQL') {
                // include_once DVWA_WEB_PAGE_TO_ROOT . 'dvwa/includes/DBMS/PGSQL.php';
                dvwaMessagePush( 'PostgreSQL is not yet fully supported.' );
                dvwaPageReload();
        }
        else {
                dvwaMessagePush( 'ERROR: Invalid database selected. Please review the config file syntax.' );
                dvwaPageReload();
        }
}

?>