Filter store listing

Hi,

I try to filter the seller_listing_search function in ajax.php. I need to add “city” and “zip” from “dokan_profile_meta” in usermeta table.

I use this:

public function seller_listing_search() {
        if ( ! isset( $_REQUEST['_wpnonce'] ) || ! wp_verify_nonce( $_REQUEST['_wpnonce'], 'dokan-seller-listing-search' ) ) {
            wp_send_json_error( __( 'Error: Nonce verification failed', 'dokan' ) );
        }

        $paged  = 1;
        $limit  = 10;
        $offset = ( $paged - 1 ) * $limit;

        $seller_args = array(
            'number' => $limit,
            'offset' => $offset
        );

        $search_term = isset( $_REQUEST['search_term'] ) ? sanitize_text_field( $_REQUEST['search_term'] ) : '';
        $pagination_base = isset( $_REQUEST['pagination_base'] ) ? sanitize_text_field( $_REQUEST['pagination_base'] ) : '';

        if ( '' != $search_term ) {

            $seller_args['search']         = "*{$search_term}*";
            $seller_args['search_columns'] = array( 'display_name' );

            $val  = rtrim( ltrim( maybe_serialize( array("city" => $search_term) ), 'a:6:{' ), '}' );
            $val2 = rtrim( ltrim( maybe_serialize( array("zip" => $search_term) ), 'a:6:{' ), '}' );

            $seller_args['meta_query'] = array(
                'relation' => 'OR',
                array(
                    'key'     => 'dokan_enable_selling',
                    'value'   => 'yes',
                    'compare' => '='
                ),
                array(
                    'key'     => 'dokan_profile_settings',
                    'value'   => $val,
                    'compare' => 'LIKE'
                ),
                array(
                    'key' => 'dokan_profile_settings',
                    'value' => $val2,
                    'compare' => 'LIKE'
                )
            );
        }

        $sellers = dokan_get_sellers( $seller_args );

        $template_args = apply_filters( 'dokan_store_list_args', array(
            'sellers'         => $sellers,
            'limit'           => $limit,
            'paged'           => $paged,
            'image_size'      => 'medium',
            'search'          => 'yes',
            'pagination_base' => $pagination_base,
            'search_query'    => $search_term,
        ) );

        ob_start();
        dokan_get_template_part( 'store-lists-loop', false, $template_args );
        $content = ob_get_clean();

        wp_send_json_success( $content );
    }

But not work… How can I add city and zip in searching function ?

Thanks