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<?php error_reporting(E_ERROR | E_PARSE); class Definition implements Serializable { private $value; public function __construct($value) { $this->value = $value; } public function serialize() { return serialize($this->value); } public function unserialize($data) { $this->value = unserialize($value); } } $a=new stdClass(); $d=new Definition($a); var_dump(unserialize(serialize([$d,'This text will appear twice',$a])));