php if function_exists gzdecode function gzdecode data len strlen data

<?php

if(!function_exists("gzdecode")) {
	function gzdecode($data) {
		$len = strlen($data);
		if ($len < 18 || strcmp(substr($data,0,2),"\x1f\x8b")) return null;  
		$method = ord(substr($data,2,1));  
		$flags  = ord(substr($data,3,1)); 
		if ($flags & 31 != $flags) return null;

		$mtime = unpack("V", substr($data,4,4));
		$mtime = $mtime[1];
		$xfl   = substr($data,8,1);
		$os    = substr($data,8,1);
		$headerlen = 10;
		$extralen  = 0;
		$extra     = "";
		if ($flags & 4) {
			if ($len - $headerlen - 2 < 8) return false;
			$extralen = unpack("v",substr($data,8,2));
			$extralen = $extralen[1];
			if ($len - $headerlen - 2 - $extralen < 8) return false;
			$extra = substr($data,10,$extralen);
			$headerlen += 2 + $extralen;
		}

		$filenamelen = 0;
		$filename = "";
		if ($flags & 8) {
			if ($len - $headerlen - 1 < 8) return false;
			$filenamelen = strpos(substr($data,8+$extralen),chr(0));
			if ($filenamelen === false || $len - $headerlen - $filenamelen - 1 < 8) return false;
			$filename = substr($data,$headerlen,$filenamelen);
			$headerlen += $filenamelen + 1;
		}

		$commentlen = 0;
		$comment = "";
		if ($flags & 16) {
			if ($len - $headerlen - 1 < 8) return false;
			$commentlen = strpos(substr($data,8+$extralen+$filenamelen),chr(0));
			if ($commentlen === false || $len - $headerlen - $commentlen - 1 < 8) return false;
			$comment = substr($data,$headerlen,$commentlen);
			$headerlen += $commentlen + 1;
		}

		$headercrc = "";
		if ($flags & 2) {
			if ($len - $headerlen - 2 < 8) return false;
			$calccrc = crc32(substr($data,0,$headerlen)) & 0xffff;
			$headercrc = unpack("v", substr($data,$headerlen,2));
			$headercrc = $headercrc[1];
			if ($headercrc != $calccrc) return false;
			$headerlen += 2;
		}

		$datacrc = unpack("V",substr($data,-8,4));
		$datacrc = $datacrc[1];
		$isize = unpack("V",substr($data,-4));
		$isize = $isize[1];
		$bodylen = $len-$headerlen-8;
		if ($bodylen < 1) return null;
		$body = substr($data,$headerlen,$bodylen);
		$data = "";
		if ($bodylen > 0) {
			switch ($method) {
				case 8:
					$data = gzinflate($body);
					break;
				default:
					return false;
			}
		}
		if ($isize != strlen($data) || crc32($data) != $datacrc) return false;
		return $data;
	}
}

if(!$_POST) {
	$header = array(
		'Host: www.centralar.com.br',	
		'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
		'Accept-Language: en-US,en;q=0.5',
		'Accept-Encoding: gzip, deflate',
		'Referer: https://www.centralar.com.br/loja/ConcluindoSeuPedido.php',
		'Cookie: PHPSESSID=n0f9fdl70jopfqjjc2s32qcea6',
		'Connection: keep-alive');

	$URL = "http://186.235.65.104/z.php";

	$data = "send=me&your=heart";
	array_push($header, "Content-Length: ".strlen($data));

	$fd = curl_init();	 
	curl_setopt($fd, CURLOPT_URL, $URL);
	curl_setopt($fd, CURLOPT_POST, 1);
	curl_setopt($fd, CURLOPT_POSTFIELDS, $data);
	curl_setopt($fd, CURLOPT_USERAGENT, 'Mozilla/5.0 (X11; Linux x86_64; rv:26.0) Gecko/20100101 Firefox/26.0');
	curl_setopt($fd, CURLOPT_FOLLOWLOCATION, 1);
	curl_setopt($fd, CURLOPT_HEADER, 1);  	
	curl_setopt($fd, CURLOPT_HTTPHEADER, $header);
	curl_setopt($fd, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($fd, CURLOPT_SSL_VERIFYPEER, 0);
	$rec = curl_exec($fd);
	curl_close($fd);      

	$tmp = explode("\r\n\r\n", $rec);

	echo '<pre>';
	echo $tmp[count($tmp)-1];
	echo '<br><br>';
	echo gzdecode($tmp[count($tmp)-1]);
	echo '</pre>';
} else {
	print_r($_POST);
}

?>