<?php require_once 'DatabaseInteraction.php'; header('Content-Type: text/xml'); echo '<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>'; echo '<response>'; echo '<msg>'; $username = $_GET['username']; $fail = 'false'; if ($username != null) { $dbi = new DatabaseInteraction(); if ($dbi->userExists($username)) { echo "{$username} exists"; $fail = 'true'; } else { echo "{$username} available"; } } else { echo "username was null.."; } echo '</msg>'; echo '<fail>'; echo "{$fail}"; echo '</fail>'; echo '</response>';