Make PHP file and zip for download

Hey I wanted to know how I can make a script where when a user hits submit a PHP file is made with information in it, then made into a zip and given for the user to download. Anyone know where I can find info on this or know a script that does this?

http://www.phpconcept.net/pclzip/index.en.php

Okay that script is good, I have most of it working. Right now what I need to know is, I am using fwrite(); how can I have a php variable inputed into the file?

I want to add this code into the file:


<?php
$why = "test";
?>


This is the code I have


$fileinfoadd = "<?php\n$why= \"test\";\n?>";
//$fileinfoadd is what gets into DB.


What I get in the file when that code is executed is this


<?php
= "test";
?>

How can I get what I want? Thanks.

Try using single quotes

$fileinfoadd = '<?php\n$why="test";\n?>";