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@ 2017-06-29T10:13:28Z

<?php

class Foo {
    private $foo;
    private $lazyLoad;
    public function saySomething() {
        return 'Saying ' . $this->foo;
    }
    private function __construct() {
    }
    public static function new() : self {
        $instance = new self();
        $instance->foo = 'something';
        return $instance;
    }
    public static function newLazy() : self {
        $instance = new self();
        $instance->lazyLoad = function () use ($instance) {
            $instance->foo = 'something lazy';
        };
        unset($instance->foo);
        return $instance;
    }
    public function __get($name) {
        ($this->lazyLoad)();
        return $this->foo;
    }
}

$foo = Foo::new();
var_dump($foo->saySomething());
$lazyFoo = Foo::newLazy();
var_dump($lazyFoo->saySomething());

Output for git.master, git.master_jit, rfc.property-hooks: string(16) "Saying something" string(21) "Saying something lazy"

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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