gistfile1.php

<?php defined('SYSPATH') OR die('No direct access allowed.');

class Auth_User_Model extends ORM {

/**
	 * Validates and optionally saves a new user record from an array.
	 *
	 * @param  array    values to check
	 * @param  boolean  save the record when validation succeeds
	 * @return boolean
	 */
	public function validate(array & $array, $save = FALSE)
	{
		$array = Validation::factory($array)
			->pre_filter('trim')
			->add_rules('email', 'required', 'length[4,127]', 'valid::email', array($this, 'email_available'))
			->add_rules('username', 'required', 'length[4,32]', 'chars[a-zA-Z0-9_.]', array($this, 'username_available'))
			->add_rules('password', 'required', 'length[5,42]')
			->add_rules('password_confirm', 'matches[password]');

		return parent::validate($array, $save);
	}