How to read php files with question arks in the url?

[Nagy B [HUNGARY]]

I want to read a file like h__p://something.tld/asd.php?asd=a&a=asdf
but it writes an error message. Why? How can I read the full file?
Maciej Kwas: I just want to read the ouput. I know about the $_GET and phps, I need to read the outuput of this.