从PHP中的mime类型获取图像类型

Question

In PHP, there are two functions, image_type_to_extension and image_type_to_mime_type , however, I am looking for the oppsite. Is there something like mime_type_to_image_type so I can retrieve the type from the mime (I only have image/jpeg, or image/png, and like to eventually get the extension)?

Please note that I cannot use exif_imagetype or getimagesize because the hosting server does not allow it. The php setting allow_url_fopen is turned off for security reasons.

Thanks.

Answer 1

You probably can use the Client URL Library (cURL) to extract this information from the raw data of the file. You can see some examples in this related answer .