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@ 2015-11-02T21:00:16Z

<?php

class Singleton {
    private static $instanciated = false;
    
    public function __construct()
    {
        if (self::$instanciated === true) {
            throw new RuntimeException('Could not instanciate class');
        }
        self::$instanciated = true;
    }
    
    private $var;
    
    public function get(): int {
        return $this->var;
    }
    
    public function set(int $value) {
        $this->var = $value;
    }
}

class Factory {
    
    private $instance = null;
    
    public function getInstance()
    {
        if ($this->instance === null) {
            $this->instance = new Singleton();
        }
        return $this->instance;
    }
}

$factory = new Factory();
$o = $factory->getInstance();
$o->set(5);

$factory2 = new Factory();
$o2 = $factory2->getInstance();
var_dump($o2->get());

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught RuntimeException: Could not instanciate class in /in/Z43OI:9 Stack trace: #0 /in/Z43OI(32): Singleton->__construct() #1 /in/Z43OI(43): Factory->getInstance() #2 {main} thrown in /in/Z43OI on line 9
Process exited with code 255.

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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