1 <?php
 2 /**
 3  * Class for handling archives.
 4  * To implement a specific archive system, create a subclass of this abstract class, and amend the implementation of Archive::open().
 5  * @package sapphire
 6  * @subpackage filesystem
 7  */
 8 abstract class Archive extends Object {
 9     /**
10      * Return an Archive object for the given file.
11      */
12     static function open($filename) {
13         if(substr($filename, strlen($filename) - strlen('.tar.gz')) == '.tar.gz' ||
14             substr($filename, strlen($filename) - strlen('.tar.bz2')) == '.tar.bz2' ||
15             substr($filename, strlen($filename) - strlen('.tar')) == '.tar') {
16                 return new TarballArchive($filename);
17             }
18     }
19     
20     function extractTo($destination, $entries = null) {
21     }
22     
23     function listing($path) {
24     }
25 }
26 
27 ?>