如何使用file_get_contents php获取图像扩展？

Question

I'm trying to copy to my server an image from another site and i plan to use

<? 
file_put_contents($toPath, file_get_contents($fromPath));
?>

Ok, but to build the $toPath i need the extension of the file. I know how to do it if the $fromPath is a normal path with name of the file at the end, but if i use a path like facebook uses http://graph.facebook.com/user_id/picture?type=large how can i get the extension?

Thank you all.

Answer 1

$size = getimagesize($fromPath);
$extension = image_type_to_extension($size[2]);

Get the image size, grab the file type.