wp-includes/ID3/getid3.lib.php:1544$mime_typestringstring public static function ImageExtFromMime($mime_type) { // temporary way, works OK for now, but should be reworked in the future return str_replace(array('image/', 'x-', 'jpeg'), array('', '', 'jpg'), $mime_type); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/ID3/getid3.lib.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.