<?php
global $wpdb;
// LOCALHOST
if ($_SERVER['HTTP_HOST'] == 'localhost:8888') {
    $db = new wpdb('root','root','pennhill_app','localhost');
}
// DEVELOPMENT
else if ($_SERVER['HTTP_HOST'] == 'library.thisispennhills.com') {
    $db = new wpdb('pennhill','EcEgElm@lt@','pennhill_libapptest','localhost');
}
// PRODUCTION
else if ($_SERVER['HTTP_HOST'] == 'pennhillslibrary.org') {
    $db = new wpdb('pennhill','EcEgElm@lt@','pennhill_libapptest','localhost');
}