WP 4.7.1 Kills SVG

4.7.1 has broken a lot more than just SVG uploads. Non-image types are passed through finfo_file to attempt to derive their “true” MIME type beyond what WP guesses based on the file name. I appreciate the effort, but PHP’s MIME database is about as incomplete as WordPress’, and often times even when it is correct it returns a different MIME than WordPress would expect for the same type of file (e.g. audio/mp3 vs audio/mpeg).

Luckily there’s a filter we can hook into to bypass this buggy behavior:

function ignore_upload_ext($checked, $file, $filename, $mimes){

	//we only need to worry if WP failed the first pass
	if(!$checked['type']){
		//rebuild the type info
		$wp_filetype = wp_check_filetype( $filename, $mimes );
		$ext = $wp_filetype['ext'];
		$type = $wp_filetype['type'];
		$proper_filename = $filename;

		//preserve failure for non-svg images
		if($type && 0 === strpos($type, 'image/') && $ext !== 'svg'){
			$ext = $type = false;
		}

		//everything else gets an OK, so e.g. we've disabled the error-prone finfo-related checks WP just went through. whether or not the upload will be allowed depends on the <code>upload_mimes</code>, etc.

		$checked = compact('ext','type','proper_filename');
	}

	return $checked;
}
add_filter('wp_check_filetype_and_ext', 'ignore_upload_ext', 10, 4);

Thanks @blobfolio,

I have already updated the plugin to work around this issue for now, slightly different to your method, but thank you for the contribution ??

it’s apen also with all fonts file…
what I can to do?

@studioshablona this thread is resolved, please start your own.