woocommerce_get_catalog_ordering_args

theme-functions.php

add_filter( 'woocommerce_get_catalog_ordering_args','custom_query_sort_args' );
function custom_query_sort_args() {
					
		// Sort by and order
        $current_order = ( isset( $_SESSION['orderby'] ) ) ? $_SESSION['orderby'] : apply_filters( 'woocommerce_default_catalog_orderby', get_option( 'woocommerce_default_catalog_orderby' ) );
					        
		switch ( $current_order ) {
			case 'date' :
				$orderby = 'date';
				$order = 'desc';
				$meta_key = '';
			break;
			case 'price' :
				$orderby = 'meta_value_num';
				$order = 'asc';
				$meta_key = '_price';
			break;
			case 'title' :
				$orderby = 'meta_value';
				$order = 'asc';
				$meta_key = '_woocommerce_product_short_title';
			break;
			default :
				$orderby = 'menu_order title';
				$order = 'asc';
				$meta_key = '';			
			break;
		}
        
        $args = array();
        		
        $args['orderby'] 		= $orderby;
        $args['order']   		= $order;
					
        if ($meta_key) :
        	$args['meta_key'] = $meta_key;
        endif;
					
        return $args;
}