Code-Documentation for http://stackoverflow.com/q/5462305/367456

example-so-5462305.php

<?php
### CC-BY 3.0 - copyright (c) 2007 Carmen Lehstl ###
function gzInflateData($data){ 
	if(substr($data,0,3)=="\37\213\10"){ 
		$start=10; 
		$flag=ord(substr($data,3,1));
		if($flag>0){
			if($flag&4){
				list($len)=unpack('v',substr($data,$start,2));
				$start=$start+2+$len;
			}
			if($flag&8) $start=strpos($data,"\0",$start)+1;
			if($flag&16) $start=strpos($data,"\0",$start)+1;
			if($flag&2) $start=$start+2;
		} 
		return gzinflate(substr($data,$start,-8));
	} 
	else return false; 
}