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@ 2016-12-20T12:47:59Z

<?php

namespace App\Com;

class Test
{
	protected static $_instance;
	
	public static function getInstance()
	{
		if(!self::$_instance)
		{
			self::$_instance = new self();
		}
		return self::$_instance;
	}
	
	public function test()
	{
		return 'works';
	}
	
	protected function __construct()
	{
	}
}

class Service
{
	protected static $_instance;
	protected $_connection;
	protected $_case = [];
	
	public static function getInstance()
	{
		if(!self::$_instance)
		{
			self::$_instance = new self();
		}
		return self::$_instance;
	}
	
	protected function __construct()
	{
		$this->_case[] = Test::getInstance();
		// TODO: Establish entity to database
	}
	
	public function using($nsp)
	{
		foreach($this->_case as $obj)
		{
			if($nsp instanceof $obj)
			{
				return $obj::getInstance();
			}
		}
		throw new \Exception("Call to $nsp did not match any libraries.");
	}
	
	protected function __clone() {}
}

echo Service::getInstance()->using('\App\Com\Test')->test();

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught Exception: Call to \App\Com\Test did not match any libraries. in /in/knhjm:58 Stack trace: #0 /in/knhjm(64): App\Com\Service->using('\\App\\Com\\Test') #1 {main} thrown in /in/knhjm on line 58
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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