Online PHP editor | refs for 1sBCg

<?php class Foo { private $bar = 'baz'; public function getBar() { return $this->bar; } } // http://3v4l.org/pc6lo#v540 class ClassicLazyFoo extends Foo { private $initialized = false; public function getBar() { $this->init(); return parent::getBar(); } private function init() { if ($this->initialized) { return; } \Closure::bind(function() { $this->bar = 'Loaded from DB!'; }, $this, get_parent_class($this))->__invoke(); } } // look ma: no method overrides! class LazyPropertyLazyFoo extends Foo { public function __construct() { \Closure::bind(function() { unset($this->bar); }, $this, get_parent_class($this))->__invoke(); } // note that other accessors also need to be created for full functional completeness public function __get($name) { \Closure::bind(function() { $this->bar = 'Loaded from DB!'; }, $this, get_parent_class($this))->__invoke(); return \Closure::bind(function() use ($name) { return $this->$name; }, $this, get_parent_class($this))->__invoke(); } } var_dump((new ClassicLazyFoo())->getBar()); var_dump((new LazyPropertyLazyFoo())->getBar());