Online PHP editor | rfc for tpnsc

@ 2025-09-17T11:56:12Z

<?php

enum WeekDay: string
{
    case Monday = 'monday';
    case Tuesday = 'tuesday';
    case Wednesday = 'wednesday';
    case Thursday = 'thursday';
    case Friday = 'friday';
    case Saturday = 'saturday';
    case Sunday = 'sunday';
}

class Bar
{}

class Foo
{
    public function hello()
    {
        return "Hello world" . PHP_EOL;
    }
}

$mondayKey = WeekDay::Monday;

echo "== WEAKMAP WITH ENUM ==" . PHP_EOL;
$map = new WeakMap();
$map[$mondayKey] = new Foo();
// etc

echo "Dumping the Map with an ENUM" . PHP_EOL;
var_dump($map);

echo "unsetting reference to ENUM's object" . PHP_EOL;
unset($mondayKey);

echo "Dumping the Map with an ENUM" . PHP_EOL;
var_dump($map);
echo "IT'STILL THERE !" . PHP_EOL;

echo PHP_EOL . PHP_EOL;

echo "== WEAKMAP WITH OBJECT ==" . PHP_EOL;
$map = new WeakMap();
$objKey = new Bar();

$map[$objKey] = new Foo();
echo "Dumping the Map with an OBJECT" . PHP_EOL;
var_dump($map);

echo "unsetting the OBJECT" . PHP_EOL;
unset($objKey);

echo "Dumping the Map with an OBJECT" . PHP_EOL;
var_dump($map);

echo "IT'S GONE !" . PHP_EOL;

echo PHP_EOL . PHP_EOL;


$tuesdayKey = WeekDay::Tuesday;
$otherTuesdayKey = WeekDay::Tuesday;

echo "== SPLOBJECTSTORAGE WITH ENUM ==" . PHP_EOL;

$objStore = new SplObjectStorage();
$objStore[$tuesdayKey] = new Foo();

echo "Dumping the SPLOBJECTSTORAGE with an ENUM" . PHP_EOL;
var_dump($objStore);

echo "unsetting the ENUM" . PHP_EOL;
unset($tuesdayKey);

echo "Dumping the SPLOBJECTSTORAGE with an ENUM" . PHP_EOL;
var_dump($objStore);

echo "IT'STILL THERE !" . PHP_EOL;

echo PHP_EOL . PHP_EOL;

echo "== SPLOBJECTSTORAGE WITH OBJECT ==" . PHP_EOL;


$objStore = new SplObjectStorage();
$objKey = new Bar();

$objStore[$objKey] = new Bar();

echo "Dumping the SPLOBJECTSTORAGE with an OBJECT" . PHP_EOL;
var_dump($objStore);

echo "unsetting the OBJECT" . PHP_EOL;
unset($tuesdayKey);

echo "Dumping the SPLOBJECTSTORAGE with an OBJECT" . PHP_EOL;
var_dump($objStore);
echo "IT'STILL THERE !" . PHP_EOL;

Output for git.master_jit, git.master: == WEAKMAP WITH ENUM == Dumping the Map with an ENUM object(WeakMap)#8 (1) { [0]=> array(2) { ["key"]=> enum(WeekDay::Monday) ["value"]=> object(Foo)#9 (0) { } } } unsetting reference to ENUM's object Dumping the Map with an ENUM object(WeakMap)#8 (1) { [0]=> array(2) { ["key"]=> enum(WeekDay::Monday) ["value"]=> object(Foo)#9 (0) { } } } IT'STILL THERE ! == WEAKMAP WITH OBJECT == Dumping the Map with an OBJECT object(WeakMap)#10 (1) { [0]=> array(2) { ["key"]=> object(Bar)#8 (0) { } ["value"]=> object(Foo)#9 (0) { } } } unsetting the OBJECT Dumping the Map with an OBJECT object(WeakMap)#10 (0) { } IT'S GONE ! == SPLOBJECTSTORAGE WITH ENUM == Dumping the SPLOBJECTSTORAGE with an ENUM object(SplObjectStorage)#8 (1) { ["storage":"SplObjectStorage":private]=> array(1) { [0]=> array(2) { ["obj"]=> enum(WeekDay::Tuesday) ["inf"]=> object(Foo)#9 (0) { } } } } unsetting the ENUM Dumping the SPLOBJECTSTORAGE with an ENUM object(SplObjectStorage)#8 (1) { ["storage":"SplObjectStorage":private]=> array(1) { [0]=> array(2) { ["obj"]=> enum(WeekDay::Tuesday) ["inf"]=> object(Foo)#9 (0) { } } } } IT'STILL THERE ! == SPLOBJECTSTORAGE WITH OBJECT == Dumping the SPLOBJECTSTORAGE with an OBJECT object(SplObjectStorage)#11 (1) { ["storage":"SplObjectStorage":private]=> array(1) { [0]=> array(2) { ["obj"]=> object(Bar)#8 (0) { } ["inf"]=> object(Bar)#9 (0) { } } } } unsetting the OBJECT Dumping the SPLOBJECTSTORAGE with an OBJECT object(SplObjectStorage)#11 (1) { ["storage":"SplObjectStorage":private]=> array(1) { [0]=> array(2) { ["obj"]=> object(Bar)#8 (0) { } ["inf"]=> object(Bar)#9 (0) { } } } } IT'STILL THERE !

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2022-12-01 RFC: Property hooks - included in PHP 8.4
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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