xml file compression with .php

[Murciano]

I need to compress xml files with something like this

$content = file_get_contents("includes/datafeed.xml");
$compressed = base64_encode(gzcompress($content));
?>
<textarea>
<?php
echo $compressed;

?>

</textarea>

as you can see im echo'ing the output to see if it is working, Hmmmmmmm it does to an extent,

 

the thing is that to be sure its working  i am uncompressing the original unedited datafeed.xml.gz files with

$content = file_get_contents("datafeed.xml.gz");
        $coded = gzuncompress(substr(base64_decode($content),3));

 

and then recompressing with the code that is inside the first block, echoing the code to check and they are very different, am i missing something?.. mime types etc,