$this comes along

1<?php2class Counter3{4    private int $n = 0;5 6    public function incrementer(): Closure7    {8        return function () {9            return ++$this->n;10        };11    }12 13    public function detached(): Closure14    {15        return static function () {16            return isset($this) ? 'has $this' : 'no $this';17        };18    }19}20$c = new Counter();21$inc = $c->incrementer();22$inc();23echo $inc(), PHP_EOL;24echo ($c->detached())(), PHP_EOL;