Well zipping is not a php function. For the zipping functions to work on your server you must download the

Download the ZZIPlib library

Download the Zip PELC extension

And install them ( find the instruction there only on how to )

The example i am going to tell is a simple one

<?php
$zipfile = new ZipArchive;
$zipfile->open(‘file.zip’);
$zipfile->extractTo(‘./’);
$zipfile->close();
echo “the requested file has been extracted”;
?>

open = open the specified zip file inside the braces

extractTo = extract the opened zip file to the location specified

close = closes a zip file

Thanks

krates