Online PHP editor | output for elfOH

<?php trait OptionzTrait { protected $_options = array(); public function setOptions(array $options) { $this->_options = array_replace_recursive( $this->_options, $options ); } public function getOptions() { return $this->_options; } } class Optionz { use OptionzTrait; protected $_inception; public function __construct($options) { $this->_options = array( 'fact' => null, 'inception' => array( 'options' => array() ) ); $this->setOptions($options); } public function stateFact() { echo $this->_options['fact'] . "\n"; } public function getInception() { if ($this->_inception === null) { $this->_inception = new static($this->_options['inception']['options']); } return $this->_inception; } public function setInception(Optionz $inception) { $this->_inception = $inception; } } $optionz = new Optionz(array('inception' => array('options' => array('fact' => 'it is known')))); $optionz->getInception()->stateFact(); // caveat: nested properties are only propagated initially $optionz->getInception()->setOptions(array('fact' => 'this works')); $optionz->getInception()->stateFact(); $optionz->setInception(null); // try this $optionz->setOptions(array('inception' => array('options' => array('fact' => 'this doesnt')))); $optionz->getInception()->stateFact();