The Zend Developer Zone has posted this new tutorial from Vikram Vaswani covering the use of different archive formats (like RAR, LZF and BZ2 compression methods) from inside PHP.
When it comes to dealing with different file formats, it's hard to faze PHP. XML documents, PDF files, JPEG images, MP3 media...you name it and, chances are, there's a PHP extension to handle it. And so it is with compression formats like RAR, LZF and Bzip2 - although these archive formats are far less common today than the ubiquitous TAR and ZIP formats, they are still actively used by many applications and projects, and continue to be supported in PHP via PECL extensions.
He pulls in a few PECL extensions to give PHP the power it needs, both for unix-based systems and Windows DLL files. He includes some sample code showing how to open up a rar file and list the contents inside as well as extract the files themselves. And, of course, code examples for compressing files into a new archive is included too.