أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
You won't have any output but a syntax error.
To compare three variables in php, you must to isolate each condition like this :
`if (($a < $b) < $c)` instead of `if ($a < $b < $c)`
and you'll have success as output.