note 117906 added to functions.returning-values

PHP 7 return types if specified can not return a null. For example: <?php declare(strict_types=1); function add2ints(int $x, int $y):int { $z = $x + $y; if ($z===0) { return null; } return $z; } $a = add2ints(3, 4); echo is_null($a) ? 'Null' : $a; $b = add2ints(-2, 2); echo is_null($b) ? 'Null' : $b; exit(); Output: 7 Process finished with exit code 139 ---- Server IP: 72.52.91.14 Probable Submitter: 71.219.50.169 ---- Manual Page -- http://php.net/manual/en/functions.returning-values.php Edit -- https://master.php.net/note/edit/117906 Del: integrated -- https://master.php.net/note/delete/117906/integrated Del: useless -- https://master.php.net/note/delete/117906/useless Del: bad code -- https://master.php.net/note/delete/117906/bad+code Del: spam -- https://master.php.net/note/delete/117906/spam Del: non-english -- https://master.php.net/note/delete/117906/non-english Del: in docs -- https://master.php.net/note/delete/117906/in+docs Del: other reasons-- https://master.php.net/note/delete/117906 Reject -- https://master.php.net/note/reject/117906 Search -- https://master.php.net/manage/user-notes.php