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<?php class prototype { private $inherited; private $instance; public function __construct(prototype $prototype = null) { $this->inherited = $prototype; $this->instance = []; } public function __set($name, $value) { if ($value instanceof \Closure) { $value = $value->bindTo($this); } $this->instance[$name] = $value; } public function __get($name) { if (array_key_exists($name, $this->instance)) { return $this->instance[$name]; } else { return $this->inherited->$name; } } public function __call($name, $arguments) { if (!isset($this->instance[$name]) && isset($this->inherited) && ($fromProto = $this->inherited->$name) instanceof \Closure)) { $target = $fromProto->bindTo($this); } else if (isset($this->instance[$name]) && $this->instance[$name] instanceof \Closure) { $target = $this->instance[$name]; } else { return; } return call_user_func_array($target, $arguments); } } $foo = new prototype; $foo->foo = 'Foo!'; $foo->bar = function() { return $this->foo; }; $bar = new prototype($foo); $bar->foo = 'Bar!'; echo $foo->bar() . "\n"; echo $bar->bar() . "\n";