//输出压缩成果
ob_end_flush();
//这是ob_gzip压缩机
function ob_gzip($content)
{
if( !headers_sent() &&
extension_loaded("zlib") &&
strstr($_SERVER["HTTP_ACCEPT_ENCODING"],"gzip"))
{
$content = gzencode($content." n//此页已压缩",9);
header("Content-Encoding: gzip");
header("Vary: Accept-Encoding");
header("Content-Length: ".strlen($content));
}
return $content;
}
?>
经过实际测试，上面代码中如果不用GZIP，是4.69KB=4802.56B，启用GZIP后缩小为104B ，呃……我数学可能不好，自己算下压缩到了原来的百分之多少吧。。
另外，下面是用FlashGet获取的日志信息，可以看到我们程序里加的header信息：
Fri Jan 25 17:53:10 2008 HTTP/1.1 200 OK
Fri Jan 25 17:53:10 2008 Server: Microsoft-IIS/5.1
Fri Jan 25 17:53:10 2008 Date: Fri, 25 Jan 2008 09:53:10 GMT
Fri Jan 25 17:53:10 2008 Connection: close
Fri Jan 25 17:53:10 2008 X-Powered-By: PHP/5.2.5
Fri Jan 25 17:53:10 2008 Content-Encoding: gzip
Fri Jan 25 17:53:10 2008 Vary: Accept-Encoding
Fri Jan 25 17:53:10 2008 Content-Length: 104
Fri Jan 25 17:53:10 2008 Content-type: text/html
