note 19934 added to language.types.boolean

That's not right. True and false are no constants since PHP4 but values of the type boolean. If you try the code if (1 == true) echo "True. 1 and true are equal."; you will notice that 1 and true are considered equal. The operator === (and its oposite !==) however compares values type sensitive: if (1 === true) echo "False. True is no integer."; -- http://www.php.net/manual/en/language.types.boolean.php http://master.php.net/manage/user-notes.php?action=edit+19934 http://master.php.net/manage/user-notes.php?action=delete+19934 http://master.php.net/manage/user-notes.php?action=reject+19934