function print_column_headers( $with_id = true ) {
		if ( isset( $_POST['pb_catalog_search'] ) ) {
			if ( ! wp_verify_nonce( esc_attr( $_POST['pb_catalog_search'] ), 'pb_catalog_search' ) ) {
				die( 'Security check.' );
			}
		}

		if ( empty( $_GET['s'] ) && ! empty( $_POST['s'] ) ) {
			$_SERVER['REQUEST_URI'] = esc_url( add_query_arg( 's', $_POST['s'] ) );
		}

		if ( empty( $_GET['orderby'] ) && ! empty( $_POST['orderby'] ) ) {
			$_GET['orderby'] = $_POST['orderby'];
		}

		if ( empty( $_GET['order'] ) && ! empty( $_POST['order'] ) ) {
			$_GET['order'] = $_POST['order'];
		}

		parent::print_column_headers( $with_id );
	}
function print_column_headers( $with_id = true ) {
		if ( isset( $_POST['pb_catalog_search'] ) ) {
			if ( ! wp_verify_nonce( esc_attr( $_POST['pb_catalog_search'] ), 'pb_catalog_search' ) ) {
				die( 'Security check.' );
			}
		}

		if ( empty( $_GET['s'] ) && ! empty( $_POST['s'] ) ) {
			$_SERVER['REQUEST_URI'] = esc_url( add_query_arg( 's', $_POST['s'] ) );
		}

		if ( empty( $_GET['orderby'] ) && ! empty( $_POST['orderby'] ) ) {
			$_GET['orderby'] = $_POST['orderby'];
		}

		if ( empty( $_GET['order'] ) && ! empty( $_POST['order'] ) ) {
			$_GET['order'] = $_POST['order'];
		}

		parent::print_column_headers( $with_id );
	}
function print_column_headers ( $ with_id = true ) { if ( isset ( $ _POST [ 'pb_catalog_search' ] ) ) { if ( ! wp_verify_nonce ( esc_attr ( $ _POST [ 'pb_catalog_search' ] ) , 'pb_catalog_search' ) ) { die ( 'Security check.' ) ; } } if ( empty ( $ _GET [ 's' ] ) && ! empty ( $ _POST [ 's' ] ) ) { $ _SERVER [ 'REQUEST_URI' ] = esc_url ( add_query_arg ( 's' , $ _POST [ 's' ] ) ) ; } if ( empty ( $ _GET [ 'orderby' ] ) && ! empty ( $ _POST [ 'orderby' ] ) ) { $ _GET [ 'orderby' ] = $ _POST [ 'orderby' ] ; } if ( empty ( $ _GET [ 'order' ] ) && ! empty ( $ _POST [ 'order' ] ) ) { $ _GET [ 'order' ] = $ _POST [ 'order' ] ; } parent :: print_column_headers ( $ with_id ) ; }
Form is POST not GET. Override parent method to compensate.

@param bool $with_id
Form is POST not GET . Override parent method to compensate .