PHP code to implement gzip compression of html data

This article introduces an example code that uses PHP to implement gzip method to compress HTML pages. Friends in need can refer to it.

The code is as follows:

<?php
/**
* gzip压缩html数据
* edit by bbs.it-home.org
*/
 ob_start("ob_gzhandler");  
 ob_start("compress");  //开启压缩
 
 header("Content-type: text/Css; charset: UTF-8");  
 header("Cache-Control: must-revalidate");  
 $off = 0; # Set to a reaonable value later, say 3600 (1 hr);  
 $exp = "Expires: " . gmdate("D, d M Y H:i:s", time() + $off) . " GMT";  
 
 header($exp);  
   
function compress($buffer) {  
     $buffer = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $buffer); // remove comments  
     $buffer = str_replace(array("\r\n", "\r", "\n", "\t", '  ', '    ', '    '), '', $buffer); // remove tabs, spaces, newlines, etc.  
     $buffer = str_replace('{ ', '{', $buffer); // remove unnecessary spaces.  
     $buffer = str_replace(' }', '}', $buffer);  
     $buffer = str_replace('; ', ';', $buffer);  
     $buffer = str_replace(', ', ',', $buffer);  
     $buffer = str_replace(' {', '{', $buffer);  
     $buffer = str_replace('} ', '}', $buffer);  
     $buffer = str_replace(': ', ':', $buffer);  
     $buffer = str_replace(' ,', ',', $buffer);  
     $buffer = str_replace(' ;', ';', $buffer);  
     return $buffer;  
 }  
   
require_once('screen.css');  
require_once('layout.css');  
require_once('custom.php');  
require_once('titles.css');  
require_once('bus.css');   
?>

For those who are interested, you can download tools or websites that detect gzip compression effects on Baidu to see what the compression ratio is!