Hello RiggsFolly, thanks for your patience.
I am an old man trying to learn new languages. I have a rule, I never ask questions in forums without first looking at existing posts for a solution.
I tested your corrected code and the result is the same.
"C: \ wamp \ www \ classe04.php: 3: int 24"
I installed another php server and the same file sends me the correct answer:
"Int
Forum:
WampServer English