All APIs can work in the Solo Learn Application?

Question

I did it with the adf.ly API, but I get the same result with the others? Because I can not on localhost.
https://code.sololearn.com/w6hLri02zaTg/?ref=app
https://code.sololearn.com/w6hLri02zaTg/?ref=app

Answer 1

In PHP there are several limitations, so it is likely that some APIs can not be used in Code Playground.

Answer 2

That's what I imagined. Thank you!