I'm just curious to know why mime_content_type() is now considered deprecated.
This method for determining the mime type is much easier than the replacement Fileinfo functionality.
The method is not deprecated!
It once was incorrectly marked as deprecated in the manual, but it has been fixed https://bugs.php.net/bug.php?id=71367 on the 14th of January 2016.
However, at the moment, it is still incorrectly marked deprecated in the German, Spanish and Chinese manual.
Feel free to use mime_content_type()
whenever you like :).