note 102341 added to language.operators.precedence

Be very careful with the precedence. See this code: $a = 1; $b = null; $c = isset($a) && isset($b); $d = ( isset($a) and isset($b) ); $e = isset($a) and isset($b); var_dump($a, $b, $c, $d, $e); Result: int(1) NULL bool(false) bool(false) bool(true) <== ---- Server IP: 69.147.83.197 Probable Submitter: 161.148.171.17 ---- Manual Page -- http://www.php.net/manual/en/language.operators.precedence.php Edit -- https://master.php.net/note/edit/102341 Del: integrated -- https://master.php.net/note/delete/102341/integrated Del: useless -- https://master.php.net/note/delete/102341/useless Del: bad code -- https://master.php.net/note/delete/102341/bad+code Del: spam -- https://master.php.net/note/delete/102341/spam Del: non-english -- https://master.php.net/note/delete/102341/non-english Del: in docs -- https://master.php.net/note/delete/102341/in+docs Del: other reasons-- https://master.php.net/note/delete/102341 Reject -- https://master.php.net/note/reject/102341 Search -- https://master.php.net/manage/user-notes.php