_screen = $screen; if ( ! empty( $columns ) ) { $this->_columns = $columns; add_filter( 'manage_' . $screen->id . '_columns', array( $this, 'get_columns' ), 0 ); } } /** * Gets a list of all, hidden, and sortable columns. * * @since 3.1.0 * * @return array */ protected function get_column_info() { $columns = get_column_headers( $this->_screen ); $hidden = get_hidden_columns( $this->_screen ); $sortable = array(); $primary = $this->get_default_primary_column_name(); return array( $columns, $hidden, $sortable, $primary ); } /** * Gets a list of columns. * * @since 3.1.0 * * @return array */ public function get_columns() { return $this->_columns; } }