Online PHP editor | refs for smcDi

<?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); });