<?php

/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Validate
 * @copyright  Copyright (c) 2005-2007 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Interface.php 3278 2007-02-07 21:54:50Z darby $
 */


/**
 * @category   Zend
 * @package    Zend_Validate
 * @copyright  Copyright (c) 2005-2007 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
interface Zend_Validate_Interface
{
    /**
     * Returns true if and only if $value meets the validation requirements
     *
     * If $value fails validation, then this method returns false, and $messages will contain an array of
     * messages that explain why the validation failed.
     *
     * @param  mixed $value
     * @throws Zend_Valid_Exception If validation of $value is impossible
     * @return boolean
     */
    public function isValid($value);

    /**
     * Returns an array of messages that explain why a previous isValid() call returned false
     *
     * If isValid() was never called or if the most recent isValid() call returned true, then
     * this method returns an empty array.
     *
     * @return array
     */
    public function getMessages();
}
