ImageCreateFromString and getimagesize in PHP

Question

Currently if a user POST/uploads a photo to my PHP script I start out with some code like this

getimagesize($_FILES[\'picture1\'][\'tmp_name\']);

Answer 1

getimagesize can be used with HTTP.

Filename - It can reference a local file or (configuration permitting) a remote file using one of the supported streams.

Thus

$info = getimagesize($url);
$image = ImageCreateFromString(file_get_contents($url));

should be fine.