(PHP 4 >= 4.0.1, PHP 5)
gzuncompress — Uncompress a compressed string
$data
   [, int $length = 0
  ] )This function uncompress a compressed string.
   The original uncompressed data or FALSE on error.
  
   The function will return an error if the uncompressed data is more than
   32768 times the length of the compressed input data 
   or more than the optional parameter length.
  
Example #1 gzuncompress() example
<?php
$compressed   = gzcompress('Compress me', 9);
$uncompressed = gzuncompress($compressed);
echo $uncompressed;
?>