Online PHP editor | refs for PVpv2

@ 2019-08-20T23:03:07Z

<?php

class Foo {
    public $ref;
    function __construct($ref = null) {
        $this->ref = $ref;
    }
}
$a = new Foo;
$b = new Foo($a);
$c = new Foo($b);
$d = clone $c;
$d->ref->ref->ref = 123;
var_export([
    $c, $d
]);