this code ain't working on playground, why? 😱😱

Question

https://code.sololearn.com/wkx1Ztri2kBt/?ref=app

Answer 1

Wrap $_GET's/code with "isset"....
if (isset($_GET["..."])) {
//
}

Answer 2

Try to use an iframe.... Still haven't achieved it....

Answer 3

thanks. but this code ain't working fully yet. when I put a value, instead of showing me result it's opening on a browser xD

Answer 4

thanks. I will try