好的，所以我有一个 index.php 文件，它必须处理许多不同的文件类型.我如何根据 REQUEST_URI 猜测文件类型.
Ok, so I have an index.php file which has to process many different file types. how do I guess the filetype based on the REQUEST_URI.
如果我请求 http://site/image.jpg，并且所有请求都通过 index.php 重定向，看起来像这样
If I request http://site/image.jpg, and all requests redirect through index.php, which looks like this
<?php
include('/www/site'.$_SERVER['REQUEST_URI']);
?>
我怎样才能让它正常工作?
How would I make that work correctly?
我应该根据请求的文件的扩展名进行测试，还是有办法获取文件类型?
Should I test based on the extension of the file requested, or is there a way to get the filetype?
如果您确定您只使用图像，您可以查看 getimagesize() exif_imagetype() PHP 函数，它尝试返回图像 mime-type.
If you are sure you're only ever working with images, you can check out the getimagesize() exif_imagetype() PHP function, which attempts to return the image mime-type.
如果您不介意外部依赖，您还可以查看优秀的 getID3 库，它可以确定许多不同文件类型的 mime-type.
If you don't mind external dependencies, you can also check out the excellent getID3 library which can determine the mime-type of many different file types.
最后，您可以查看 mime_content_type() 函数 - 但它已被 Fileinfo PECL 扩展名弃用.
Lastly, you can check out the mime_content_type() function - but it has been deprecated for the Fileinfo PECL extension.
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