1<?php 2 3/* 4 * This file is part of the Symfony package. 5 * 6 * (c) Fabien Potencier <fabien@symfony.com> 7 * 8 * For the full copyright and license information, please view the LICENSE 9 * file that was distributed with this source code. 10 */ 11 12namespace Symfony\Component\Config\Resource; 13 14/** 15 * ResourceInterface is the interface that must be implemented by all Resource classes. 16 * 17 * @author Fabien Potencier <fabien@symfony.com> 18 */ 19interface ResourceInterface 20{ 21 /** 22 * Returns a string representation of the Resource. 23 * 24 * This method is necessary to allow for resource de-duplication, for example by means 25 * of array_unique(). The string returned need not have a particular meaning, but has 26 * to be identical for different ResourceInterface instances referring to the same 27 * resource; and it should be unlikely to collide with that of other, unrelated 28 * resource instances. 29 * 30 * @return string A string representation unique to the underlying Resource 31 */ 32 public function __toString(); 33} 34