note 117924 added to function.define

If you negate a boolean named constant, you get the opposite boolean in return which can be useful for conditional statements. A named constant can only have scalar values: boolean, float, integer, string or null. In the cases of float, integer, and string, negating a named constant always returns false. In the case of null, negating a named constant always returns true. If the named constant has a boolean value, negating it returns the opposite boolean. <?php define (‘CNST_FALSE', false); define (‘CNST_TRUE', true); if(!CNST_FALSE) { echo ’T’; } else{ echo ’F’; } output: ‘T' if(!CNST_TRUE) { echo ’F’; } else{ echo ’T’; } output: ‘F' ---- Server IP: 72.52.91.14 Probable Submitter: 143.229.168.46 ---- Manual Page -- http://php.net/manual/en/function.define.php Edit -- https://master.php.net/note/edit/117924 Del: integrated -- https://master.php.net/note/delete/117924/integrated Del: useless -- https://master.php.net/note/delete/117924/useless Del: bad code -- https://master.php.net/note/delete/117924/bad+code Del: spam -- https://master.php.net/note/delete/117924/spam Del: non-english -- https://master.php.net/note/delete/117924/non-english Del: in docs -- https://master.php.net/note/delete/117924/in+docs Del: other reasons-- https://master.php.net/note/delete/117924 Reject -- https://master.php.net/note/reject/117924 Search -- https://master.php.net/manage/user-notes.php