get_magic_quotes_gpc()

if ( !get_magic_quotes_gpc() ) {
 #$comment = stripslashes($comment);
 #$subject = stripslashes($subject);
} else {
 $comment = stripslashes($comment);
 $subject = stripslashes($subject);
}

if ( ! get_magic_quotes_gpc() ) {
 $comment = addslashes($comment);
 $subject = addslashes($subject);
} else {
}

================================

http://man.phpschool.com/manual/en/function.get-magic-quotes-gpc.php

<?php
if (get_magic_quotes_gpc()) {
   function maybeaddslashes(&$inthing) { }
   function maybestripslashes(&$inthing) {
       if (is_array($inthing)) {
           foreach ($inthing as $element) {
               $element = stripslashes($element);
           }
       } else {
           $inthing = stripslashes($inthing);
       }
   }
} else {
   function maybeaddslashes(&$inthing) {
       if (is_array($inthing)) {
           foreach ($inthing as $element) {
               $element = addslashes($element);
           }
       } else {
           $inthing = addslashes($inthing);
       }
   }
   function maybestripslashes(&$inthing) {}
}
?>