How to extract a tar.gz archive in PHP without system()?

[Flamer]

I have been wondering for couple of days: Is there a way to extract files from a .tar.gz archive in PHP without resorting to calling system commands with \[code\]system()\[/code\]? (So: either with a built-in classes/functions or using an external free library?)I need it to work both on Windows (development) and Linux (deployment), if possible.Thank you.