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run code in 300+ PHP versions simultaneously
<?php class T implements Serializable { protected $_data = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => array( 'x', 'y', 'z', )); public function serialize() { $vars = get_object_vars($this); var_dump($vars); $vars['_data']['d'] = serialize($vars['_data']['d']); var_dump($vars); return serialize($_data); } public function unserialize($vars) {} }

preferences:
36.73 ms | 402 KiB | 5 Q