exit function causes the script to terminate immediately.
It can be used to quit a script from within a complicated set of
function calls, which might otherwise require numerous returns and
checks. An optional exit code
$code may be given; the default
exit returns nothing.
<$pw = "FRvEhbGTRAWug">
<pwencrypt $pass $pw>
<IF $ret neq $pw>
Your password is incorrect.
This function could be called to check a user's password at any point,
without having an
IF statement after every call: it only returns
if the password is correct.
State information may be lost if
$url hasn't been printed yet.