-$INC = sprintf("inc/modules/guest/what-%s.php", SQL_ESCAPE($GLOBALS['what']));
-$IS_VALID = WHAT_IS_VALID($GLOBALS['action'], $GLOBALS['what'], "guest");
-
-if ((FILE_READABLE($INC)) && ($IS_VALID)) {
+$inc = sprintf("inc/modules/guest/what-%s.php", getWhat());
+if (isIncludeReadable($inc)) {