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<?php class Bar { private $baz = 'tab'; } class Foo { private $baz = 'baz'; public function __construct() { $this->accessor = function () { return $this->baz; }; $this->writer = function ($bar) { $this->baz = $bar; }; } } $foo = new Foo(); $bar = new Bar(); $accessor = function () { return $this->baz; }; var_dump($accessor()); $accessor = Closure::bind($foo->accessor, $bar, 'Bar'); var_dump($accessor()); $writer = Closure::bind($foo->writer, $bar, 'Bar'); $writer('taz'); var_dump($bar);
Output for git.master_jit, git.master, rfc.property-hooks
Deprecated: Creation of dynamic property Foo::$accessor is deprecated in /in/ZG0Km on line 14 Deprecated: Creation of dynamic property Foo::$writer is deprecated in /in/ZG0Km on line 15 Fatal error: Uncaught Error: Using $this when not in object context in /in/ZG0Km:22 Stack trace: #0 /in/ZG0Km(24): {closure}() #1 {main} thrown in /in/ZG0Km on line 22
Process exited with code 255.

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