How to enable gzip in PHP to improve web page response speed

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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