On some sites, pictures have a link without an extension, for example:
http: //***.info/pics.php? q = up9% 2B77xAPRJrpRYH% 2F4% 2BC6vJ5CbLhqlstelNXijqA1J3OASEH6ivsjTiaA03I3RN1y6nEcC
They are saved as "pics.php"
How can I make them save with the "jpg" extension?