Online PHP editor | output for uN9dA

<?php class A { public $x; public $y; public function __construct($x, $y) { $this->x = ($x); $this->y = $y; } public function __clone() { return new A($this->x, $this->y); } } class B extends A { public $z; public function __construct($z, $parent_obj) { $this->z = $z; parent::__construct($parent_obj->x, $parent_obj->y); } public function doSomeThing() { $parent_a_array = (array) parent::__clone(); var_dump($parent_a_array); $child_a_array = array_diff_assoc((array) $this, $parent_a_array); var_dump($child_a_array); echo "Parent Array Printing :\n"; foreach ($parent_a_array as $key => $value) { echo "Key: $key; Value: $value\n"; } echo "\nChild Array Printing: \n"; foreach ($child_a_array as $key => $value) { echo "Key: $key; Value: $value\n"; } } } $t = new B('C', new A("A", "B")); $t->doSomeThing();