php - Get image extension from file got with file_get_contents

Question

How do I get the file extension from $image?

$image = file_get_contents($url);

Answer 1

It's much easier to do it using the filename.

Use getimagesize($url). In particular, see index 2 of the resulting array.

Answer 2

You can't, you only have the contents. Get it from $url instead if possible:

$extension = pathinfo($url, PATHINFO_EXTENSION);