[1llusion]

does not work as you say.

if you change the extension appears: "The image can not be displayed because it contains errors."

while using "tamperdata" does not allow you upload, because changing from. php.gif a. php system does not accept the extension.

works well for all sites.

there must be a way to bypass. help me!

I was asking, not telling.
Have you tried "binding" the php file to the end of the picture?