Found this on challenge... Please explain how it work.

Question

What is the output of this code?
$x = 5 /* + 15 */ + 7;
echo $x;

Answer 1

The /* */ are there to show where comments are at.
just like // except you control use it inside a row, or over different rows.

So this is what it also could've said:
$x = 5 /* Comment */ +7;

That's exactly like:
$x = 5 + 7;

Answer 2

oh didn't see that... the question is kinda confusing... thanks for the answer

Answer 3

12