Основное назначение скрипта - сжатие страниц,
передаваемых сервером браузеру. У меня в среднем сжималось в 4 раза.
Одно "НО": Не ставьте уровень сжатия больше 3 - размер не
уменьшится, а нагрузка на сервер - еще как.
<?php
/*
** Title.........: PHP4
HTTP Compression Speeds up the Web
** Version.......: 1.20
** Author........: catoc
<catoc@163.net>
** Filename......:
gzdoc.php
** Last changed..:
18/10/2000
** Requirments...: PHP4
>= 4.0.1
** PHP was configured
with --with-zlib[=DIR]
** Notes.........:
Dynamic Content Acceleration compresses
** the data transmission
data on the fly
** code by sun jin hu
(catoc) <catoc@163.net>
** Most newer browsers
since 1998/1999 have
** been equipped to
support the HTTP 1.1
** standard known as
"content-encoding."
** Essentially the
browser indicates to the
** server that it can
accept "content encoding"
** and if the server is
capable it will then
** compress the data and
transmit it. The
** browser decompresses
it and then renders
** the page.
**
** Modified by John Lim
(jlim@natsoft.com.my)
** based on ideas by
Sandy McArthur, Jr
** Usage........:
** No space before the
beginning of the first '<?' tag.
** ------------Start of
file----------
** |<?
** |
include('gzdoc.php');
** |?>
** |<HTML>
** |... the page ...
** |</HTML>
** |<?
** | gzdocout();
** |?>
** -------------End of
file-----------
*/
ob_start();
ob_implicit_flush(0);
function CheckCanGzip(){
global
$HTTP_ACCEPT_ENCODING;
if (headers_sent() ||
connection_aborted()){
return 0;
}
if
(strpos($HTTP_ACCEPT_ENCODING, 'x-gzip') !== false) return "x-gzip";
if
(strpos($HTTP_ACCEPT_ENCODING, 'gzip') !== false) return "gzip";
return 0;
}
/* $level = compression
level 0-9, 0=none, 9=max */
function
GzDocOut($level=3, $debug=0){
$ENCODING =
CheckCanGzip();
if ($ENCODING){
print "\n<!-- Use
compress $ENCODING -->\n";
$Contents =
ob_get_contents();
ob_end_clean();
if ($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;
}
}
?>
