/** * Constructor. * * @param array $date_query * @param string $column * * @see WP_Date_Query::__construct() */ public function __construct($date_query, $column = '') { if (!empty($column)) { $this->column = $column; add_filter('date_query_valid_columns', array($this, 'register_date_column')); } parent::__construct($date_query, $column); }