问题描述
你如何在 PHP 文件中实现 etags?我要上传什么到服务器,我要在 PHP 文件中插入什么?
How do you implemented etags inside a PHP file? What do I upload to the server and what do I insert into my PHP file?
推荐答案
创建/编辑您的 .htaccess 文件并添加以下内容:
Create / edit your .htaccess file and add the following:
FileETag MTime Size
将以下内容放在函数中或将其放在需要 etags 处理的 PHP 文件的顶部:
Either place the following inside a function or put it at the top of the PHP file that you need etags to work on:
<?php $file = 'myfile.php'; $last_modified_time = filemtime($file); $etag = md5_file($file); header("Last-Modified: ".gmdate("D, d M Y H:i:s", $last_modified_time)." GMT"); header("Etag: $etag"); if (@strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) == $last_modified_time || trim($_SERVER['HTTP_IF_NONE_MATCH']) == $etag) { header("HTTP/1.1 304 Not Modified"); exit; } ?>