[PHP] Unzipping Files

[Matt Palermo]

Anyone know where I can find tutorials or examples on how to use the
gunzip, gzip, and other commands using PHP to work with compressed
files?  I would really appreciate it if someone could send me some links
or examples of how to use them.  My goal would be to be able to extract
.zip, .gz, and other types of compressed files using a PHP script.  Let
me know if you can help. 
 
Thanks,
 
Matt