/**
* Constructor
*
* Sets the $_SESSION superglobal to an ArrayObject, maintaining previous
* values if any discovered.
*
* @param array|null $input
* @param int $flags
* @param string $iteratorClass
*/
public function __construct($input = null, $flags = ArrayObject::ARRAY_AS_PROPS, $iteratorClass = '\\ArrayIterator')
{
$resetSession = true;
if (null === $input && isset($_SESSION)) {
$input = $_SESSION;
if (is_object($input) && $_SESSION instanceof ArrayObject) {
$resetSession = false;
} elseif (is_object($input) && !$_SESSION instanceof ArrayObject) {
$input = (array) $input;
}
} elseif (null === $input) {
$input = array();
}
parent::__construct($input, $flags, $iteratorClass);
if ($resetSession) {
$_SESSION = $this;
}
}
