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@ 2024-01-13T19:28:15Z

<?php

interface StrategyInterface
{
    public function run();
}

class Strategy implements StrategyInterface
{
    protected ?string $value = null;
    private static $counter = 0;

    public function __construct(private Closure $closure)
    {
        echo "Strategy Counter: ", ++self::$counter, PHP_EOL;
        $this->value = (string)rand(1, 100);
    }

    public function run()
    {
        $this->closure->call($this);
    }

    public function __destruct()
    {
        echo "Strategy Counter: ", --self::$counter, PHP_EOL;
    }
}

$strategy1 = new Strategy(function () {
    var_dump($this->value);
});

$strategy2 = new Strategy(function () {
    var_dump($this->value);
});

$strategy3 = new Strategy(function () {
    var_dump($this->value);
});


$strategy1->run();
$strategy1 = null;
$strategy2->run();
unset($strategy2);
$strategy3->run();

$strategy4 = new Strategy(function () {
    var_dump($this->value);
});

Output for git.master: Strategy Counter: 1 Strategy Counter: 2 Strategy Counter: 3 string(2) "81" Strategy Counter: 2 string(2) "57" Strategy Counter: 1 string(2) "37" Strategy Counter: 2 Strategy Counter: 1 Strategy Counter: 0
Output for git.master_jit: Strategy Counter: 1 Strategy Counter: 2 Strategy Counter: 3 string(2) "21" Strategy Counter: 2 string(2) "87" Strategy Counter: 1 string(2) "44" Strategy Counter: 2 Strategy Counter: 1 Strategy Counter: 0
Output for rfc.property-hooks: Strategy Counter: 1 Strategy Counter: 2 Strategy Counter: 3 string(2) "85" Strategy Counter: 2 string(2) "85" Strategy Counter: 1 string(2) "85" Strategy Counter: 2 Strategy Counter: 1 Strategy Counter: 0

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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