Bug #75228 [Nab]: anonymous function keep context if does not need

Edit report at https://bugs.php.net/bug.php?id=75228&edit=1 ID: 75228 Updated by: requinix@php.net Reported by: milan dot matejcek at gmail dot com Summary: anonymous function keep context if does not need Status: Not a bug Type: Bug Package: Class/Object related Operating System: linux PHP Version: 5.6.31 Block user comment: N Private report: N New Comment: > Is it possible add condition for bounding? Not really. But it is possible to make static closures very easily, as the documentation demonstrates. Previous Comments: ------------------------------------------------------------------------ [2017-09-19 14:39:11] milan dot matejcek at gmail dot com I understand, current class is automatically bound. Is it possible add condition for bounding? Is it context need in anonymous function? Because object is in memory, but i have'nt defined variable for this object. ------------------------------------------------------------------------ [2017-09-19 14:26:43] requinix@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php > As of PHP 5.4.0, when declared in the context of a class, the current class is > automatically bound to it, making $this available inside of the function's > scope. If this automatic binding of the current class is not wanted, then static > anonymous functions may be used instead. http://php.net/manual/en/functions.anonymous.php ------------------------------------------------------------------------ [2017-09-19 14:16:01] milan dot matejcek at gmail dot com Description: ------------ I tried on version php5.6-7.2 here is same behavior like in test script. I create anonymous function in class body, in function i don't need context $this but anonymous function keep the reference to Foo object in memory until end of run time. Foo class has not defined variable by myself. In test script is hack like class bar. Test script: --------------- class MyClass { public $event; } class Foo { public function __construct(MyClass $bar) { $bar->event = function () { // this keep reference on $this, when i don't use $this }; } public function __destruct() { echo __CLASS__ . ' '; } } // hack how remove reference for context class Bar { public function __construct(MyClass $bar) { $bar->event = self::createAnonymousFunction(); } private static function createAnonymousFunction() { return function () { // this does not keep reference }; } public function __destruct() { echo __CLASS__ . ' '; } } $myClass1 = new MyClass(); $myClass2 = new MyClass(); new Foo($myClass1); new Bar($myClass2); echo "Hello "; Expected result: ---------------- Foo Bar Hello Actual result: -------------- Bar Hello Foo ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=75228&edit=1