<?php
class A
{
    public $data = [];
    public function __destruct()
    {
        gc_collect_cycles();
    }

    public function getB()
    {
        $this->data['foo'] = new B($this);
        $this->data['bar'] = new B($this);
        // Return either of the above
        return $this->data['foo'];
    }
}

class B
{
    public function __construct(public $A) {}

    public function __destruct()
    {
    }
}

for ($i = 0; $i < 2; $i++)
{
    $Aobj = new A;
    $Bobj = $Aobj->getB();
    unset($Bobj);
    unset($Aobj);
}

echo "DONE\n";
?>