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@ 2014-05-05T16:09:39Z

<?php

namespace Ozzie;

use Exception;
use ReflectionClass;

class Language {

    const DUTCH = 1;

    private static $languages_values;

    public static function getConstName($value) {
        if (isset(self::$languages_values[$value])) {
        	return self::$languages_values[$value];
        }

        throw new Exception('de value bestaat niet!');
    }

	public static function init() {
		static $initialized = false;

		if ( ! $initialized) {
			$ref_class              = new ReflectionClass(self::class);
			self::$languages_values = array_flip($ref_class->getConstants());

            $initialized = true;
		}
    }

}

// ja, dit zet je in het zelfde bestand
Language::init();

// nee, dit dan weer niet niet
echo Language::getConstName(1), Language::getConstName(42);

Output for git.master, git.master_jit, rfc.property-hooks: DUTCH Fatal error: Uncaught Exception: de value bestaat niet! in /in/Bl4TO:19 Stack trace: #0 /in/Bl4TO(39): Ozzie\Language::getConstName(42) #1 {main} thrown in /in/Bl4TO on line 19
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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