What kind of file types does PHP getimagesize() re

Question

Does anyone know all the possible results for the 3rd value returned from PHP's getimagesize() function? Example this code below will return:

• $imageinfo['2'] = 2; for a jpg image,
• $imageinfo['2'] = 3; for a png image,
• $imageinfo['2'] = 0; for a gif image.

The numbers might not be correct above but you get the idea.

I can't find on php.net or anywhere else a list of all possible results for the 3rd value.

$imageinfo = getimagesize($imageurl);
$image_type  = $imageinfo['2'];

Answer 1

Quoting the manual :

Index 2 is one of the IMAGETYPE_XXX constants indicating the type of the image.

And you can find those constants onh this page, amongst the other defined by GD