This article mainly shares with you how to enable gzip in PHP to improve web page response speed. I hope it can help everyone.
1. Turn on gzip in apache (this method requires restarting the server):
a. Turn on the module:
LoadModule deflate_module modules/mod_deflate.so LoadModule headers_module modules/mod_headers.so
b.Add in httpd.conf
<ifmodule deflate_module> DeflateCompressionLevel 9 AddOutputFilterByType DEFLATE text/html text/plain text/xml application/json application/xml AddOutputFilter DEFLATE js css AddOutputFilter INCLUDES .shtml .htm .xml .php .html</ifmodule>
c. Restart the server
2. PHP enables gzip
Principle:
header("Content-Encoding: gzip");echo gzencode('songjiankang');
Example 1:
function ob_gzip ($content) // $content 就是要压缩的页面内容,或者说饼干原料{ if (! headers_sent() && // 如果页面头部信息还没有输出 extension_loaded("zlib") && // 而且zlib扩展已经加载到PHP中 strstr($_SERVER["HTTP_ACCEPT_ENCODING"], "gzip")) // 而且浏览器说它可以接受GZIP的页面 { $content = gzencode($content . " \n//此页已压缩", 9); // 此页已压缩”的注释标签,然后用zlib提供的gzencode()函数执行级别为9的压缩,这个参数值范围是0-9,0表示无压缩,9表示最大压缩,当然压缩程度越高越费CPU。 // 然后用header()函数给浏览器发送一些头部信息,告诉浏览器这个页面已经用GZIP压缩过了! header("Content-Encoding: gzip"); header("Vary: Accept-Encoding"); header("Content-Length: " . strlen($content)); } return $content; // 返回压缩的内容,或者说把压缩好的饼干送回工作台。}ob_start('ob_gzip');
Example 2:
#ob_gzhandler 为php内置函数,具体参考手册ob_start('ob_gzhandler');
Related recommendations:
How to enable GZIP compression in Apache
php determines whether the page file has been gzip compressed
Teach you how to enable Gzip compression method in Node.js
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