Probably because the script checks file extensions. A dynamic image could introduce malicious code onto the page, which is why dynamic images are not accepted in most cases.
He means a dynamically created image. If you check the image properties you'll see the image is named code.php because the image gets created dynamically by some PHP code.
He means a dynamically created image. If you check the image properties you'll see the image is named code.php because the image gets created dynamically by some PHP code.