PHP两种方法实现gzip页面压缩，不过这两种方法实现的前提是服务器要支持gzip压缩才行，服务器不支持的话，两种方法都是白搭了。
下面正文开始介绍如何利用 php 实现 gzip 页面压缩功能。
方法一（用php的内置压缩函数）：
<p><?PHP </p>if(Extension_Loaded('zlib')) Ob_Start('ob_gzhandler'); <br />Header("Content-type: text/html"); <br />?> <br /><html> <br /><head> <br /><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <br /><title>scutephp</title> <br /></head> <br /><body> <br /><?php <br />for($i=0;$i<10000;$i++){ <br />echo 'Hello World!'; <br />} <br />?> <br /></body> <br /></html> <br /><?PHP <br />if(Extension_Loaded('zlib')) Ob_End_Flush(); <br /><p>?>方法二（自写函数）：
<p><?php ob_start('ob_gzip'); ?> </p><html> <br /><head> <br /><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <br /><title>scutephp</title> <br /></head> <br /><body> <br /></body> <br /></html> <br /><?php <br />ob_end_flush(); <br />//压缩函数 <br />function ob_gzip($content){ <br />if(!headers_sent()&&extension_loaded("zlib")&&strstr($_SERVER["HTTP_ACCEPT_ENCODING"],"gzip")){ <br />$content = gzencode($content,9); <br />header("Content-Encoding: gzip"); <br />header("Vary: Accept-Encoding"); <br />header("Content-Length: ".strlen($content)); <br />} <br />return $content; <br />} <br />?>
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