File Source for gzip.inc.php

<?
ob_start();
ob_implicit_flush(0);
/**
* Проверка заголовка
* @package PHPShopInc
* @return mixed
*/
function CheckCanGzip(){
global $HTTP_ACCEPT_ENCODING;
if (headers_sent() || connection_aborted()){
return 0;
}
if (strpos($_SERVER["HTTP_ACCEPT_ENCODING"],'x-gzip') !== false) return "x-gzip";
if (strpos($_SERVER["HTTP_ACCEPT_ENCODING"],'gzip') !== false) return "gzip";
return 0;
}
/**
* Компресия
* @package PHPShopInc
* @param int $level compression level 0-9
* @param bool $debug вывод информации по сжатию
*/
function GzDocOut($level,$debug){
$ENCODING = CheckCanGzip();
if ($ENCODING){
print "";
$Contents = ob_get_contents();
ob_end_clean();
if ($debug){
$s = "<center><font style='color:#C0C0C0;font-size:9px;font-family:tahoma'>Not compress length: ".strlen($Contents)."; ";
$s .= "Compressed length: ".strlen(gzcompress($Contents,$level))."</font></center>";
$Contents .= $s;
}
header("Content-Encoding: $ENCODING");
print "\x1f\x8b\x08\x00\x00\x00\x00\x00";
$Size = strlen($Contents);
$Crc = crc32($Contents);
$Contents = gzcompress($Contents,$level);
$Contents = substr($Contents, 0, strlen($Contents) - 4);
print $Contents;
print pack('V',$Crc);
print pack('V',$Size);
exit;
}else{
ob_end_flush();
exit;
}
}
?>

Source for file gzip.inc.php