1<?php 2/** 3 * This file is part of FPDI 4 * 5 * @package setasign\Fpdi 6 * @copyright Copyright (c) 2020 Setasign GmbH & Co. KG (https://www.setasign.com) 7 * @license http://opensource.org/licenses/mit-license The MIT License 8 */ 9 10namespace setasign\Fpdi\PdfParser\Filter; 11 12/** 13 * Interface for filters 14 * 15 * @package setasign\Fpdi\PdfParser\Filter 16 */ 17interface FilterInterface 18{ 19 /** 20 * Decode a string. 21 * 22 * @param string $data The input string 23 * @return string 24 */ 25 public function decode($data); 26} 27