Online PHP editor | rfc for bCTP4

@ 2014-10-09T16:58:25Z

<?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 magic 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 $this->$name;
    }
}


var_dump((new ClassicLazyFoo())->getBar());
var_dump((new LazyPropertyLazyFoo())->getBar());

Output for git.master, git.master_jit, rfc.property-hooks: string(15) "Loaded from DB!" Warning: Undefined property: LazyPropertyLazyFoo::$bar in /in/bCTP4 on line 52 NULL

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