1<?php
2/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
3
4/**
5 * Keep only the files that have a specific extension
6 *
7 * PHP versions 4 and 5
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330,Boston,MA 02111-1307 USA
22 *
23 * @category   File Formats
24 * @package    File_Archive
25 * @author     Vincent Lascaux <vincentlascaux@php.net>
26 * @copyright  1997-2005 The PHP Group
27 * @license    http://www.gnu.org/copyleft/lesser.html  LGPL
28 * @version    CVS: $Id: Extension.php,v 1.5 2005/04/21 10:01:46 vincentlascaux Exp $
29 * @link       http://pear.php.net/package/File_Archive
30 */
31
32require_once "File/Archive/Predicate.php";
33
34/**
35 * Keep only the files that have a specific extension
36 *
37 * @see        File_Archive_Predicate, File_Archive_Reader_Filter
38 */
39class File_Archive_Predicate_Extension extends File_Archive_Predicate
40{
41    var $extensions;
42
43    /**
44     * @param $extensions array or comma separated string of allowed extensions
45     */
46    function File_Archive_Predicate_Extension($extensions)
47    {
48        if (is_string($extensions)) {
49            $this->extensions = explode(",",$extensions);
50        } else {
51            $this->extensions = $extensions;
52        }
53    }
54    /**
55     * @see File_Archive_Predicate::isTrue()
56     */
57    function isTrue(&$source)
58    {
59        $filename = $source->getFilename();
60        $pos = strrpos($filename, '.');
61        $extension = "";
62        if ($pos !== FALSE) {
63            $extension = strtolower(substr($filename, $pos+1));
64        }
65        $result = in_array($extension, $this->extensions);
66
67        return $result;
68    }
69}
70
71?>