if ($some_condition) {
   some_stuff();
   if (!$some_condition2) {
      some_more_stuff();
   }
}

##</code><code>##

if ($some_condition) {
   some_stuff();
}

if ($some_condition && !$some_condition2) {
   some_more_stuff();
}

##</code><code>##

IF: {
   if (some_condition) {
      some_stuff();
      last IF if $some_condition2;
      some_more_stuff();
   }
}