Gzip可以压缩网页大小从而达到加速打开网页的速度，目前主流的浏览器几乎都支持这个功能，但开启Gzip是需要服务器支持的，在这里我们简单的使用php来判断服务器是否支持Gzip功能。
新建一个php类型文件，可命名为test.php，该文件中写入下面这段代码：
然后保存并上传至你需要测试的空间的根目录下，上传完毕之后在浏览器中打开这个文件的URL：
http://你的域名及目录/test.php，例如本站即为：http://3aj.cn/test.php
打开该页面之后，CTRL+F查找以下字符串：
_SERVER["HTTP_ACCEPT_ENCODING"]
找到后看后面为否有gzip这个参数，如果有那么恭喜你，你的空间支持Gzip，如果没有，很遗憾，这就说明你的网站无法使用Gzip压缩了。
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