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<?php class Amount { private $_list = array(); protected $_number; public function __construct($number) { $this->_number = $number; } public function add(Amount $a) { array_push($this->_list, $this->_number); unset($this->_number); array_push($this->_list, $a->_number); } } $x = new Amount(2); $y = new Amount(3); var_dump($x->add($y));
Output for git.master, git.master_jit, rfc.property-hooks
NULL

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