Get MIME types for CDN hosted files

cdn_mime_types.php

<?php

$fileUrl = 'http://t2.gstatic.com/images?q=tbn:ANd9GcS8ntYWjylXybJ4WIr5WvFJiknlXdS8jkhwpaRXqhCY3w2vFyuR-Q';

// Get the file's MIME type
// This method is used because many file URLs hosted on CDNs do not contain file extensions
$finfo = new finfo(FILEINFO_MIME_TYPE);
$mediaType = $finfo->buffer(file_get_contents($fileUrl));

// Is this an image, audio, text, video, etc.?
$type = dirname($mediaType);

// Probably your best guess at the file extension when it's not contained in the URL
$subtype = basename($mediaType);

echo $mediaType;