<?php
$errors = array();
if(isset($_POST['login'])){
	$username = preg_replace('/[^A-Za-z]/', '', $_POST['username']);
	$email = $_POST['email'];
	$fname = $_POST['fname'];
	$lname = $_POST['lname'];
	$password = $_POST['password'];
	$c_password = $_POST['c_password'];


	if(file_exists('users/' . $username . '.xml')){
		$errors[] = 'Username already exists';
	}
	if($username == ''){
		$errors[] = 'Username is blank';
	}
	if($email == ''){
		$errors[] = 'Email is blank';
	}
	if($fname == ''){
		$errors[] = 'First name is blank';
	}
	if($password == '' || $c_password == ''){
		$errors[] = 'Passwords are blank';
	}
	if($password !== $c_password){
		$errors[] = 'Passwords do not match';
	}
	if(count($errors) == 0){
		$xml = new SimpleXMLElement('<user></user>');
		$xml->addChild('password', $password);
		$xml->addChild('email', $email);
		$xml->addChild('fname', $fname);
		$xml->addChild('lname', $lname);
		$xml->asXML('users/' . $username . '.xml');
		header('Location: login.php');
		die;
	}
}