note 127364 added to language.oop5.late-static-bindings

Example of setting up static property in child class from parent only if it isn't already defined, many people would expect that output will be "Foo Bar" but instead we get "Foo Foo": <?php class Foo { public static string $A; public static function init() { return "Foo"; } public static function get() { if (!isset(static::$A)) { static::$A = static::init(); } return static::$A; } } class Bar extends Foo { public static function init() { return "Bar"; } } $foo = new Foo(); $bar = new Bar(); echo $foo->get(); echo $bar->get(); ?> Output: Foo Foo ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.5.135 (proxied: 213.147.120.136) ---- Manual Page -- https://php.net/manual/en/language.oop5.late-static-bindings.php Edit -- https://main.php.net/note/edit/127364 Del: integrated -- https://main.php.net/note/delete/127364/integrated Del: useless -- https://main.php.net/note/delete/127364/useless Del: bad code -- https://main.php.net/note/delete/127364/bad+code Del: spam -- https://main.php.net/note/delete/127364/spam Del: non-english -- https://main.php.net/note/delete/127364/non-english Del: in docs -- https://main.php.net/note/delete/127364/in+docs Del: other reasons-- https://main.php.net/note/delete/127364 Reject -- https://main.php.net/note/reject/127364 Search -- https://main.php.net/manage/user-notes.php