Remove product-category slug from Woocommerce

remove-woo-slug.php

<?php
/*
Plugin Name: Remove product-category slug
Plugin URI: https://timersys.com/
Description: Check if url slug matches a woocommerce product category and use it instead
Version: 0.1
Author: Timersys
License: GPLv2 or later
*/

add_filter('request', function( $vars ) {
	global $wpdb;
	if( ! empty( $vars['pagename'] ) || ! empty( $vars['category_name'] ) || ! empty( $vars['name'] ) || ! empty( $vars['attachment'] ) ) {
		$slug = ! empty( $vars['pagename'] ) ? $vars['pagename'] : ( ! empty( $vars['name'] ) ? $vars['name'] : ( !empty( $vars['category_name'] ) ? $vars['category_name'] : $vars['attachment'] ) );
		$exists = $wpdb->get_var( $wpdb->prepare( "SELECT t.term_id FROM $wpdb->terms t LEFT JOIN $wpdb->term_taxonomy tt ON tt.term_id = t.term_id WHERE tt.taxonomy = 'product_cat' AND t.slug = %s" ,array( $slug )));
		if( $exists ){
			$old_vars = $vars;
			$vars = array('product_cat' => $slug );
			if ( !empty( $old_vars['paged'] ) || !empty( $old_vars['page'] ) )
				$vars['paged'] = ! empty( $old_vars['paged'] ) ? $old_vars['paged'] : $old_vars['page'];
			if ( !empty( $old_vars['orderby'] ) )
	 	        	$vars['orderby'] = $old_vars['orderby'];
      			if ( !empty( $old_vars['order'] ) )
 			        $vars['order'] = $old_vars['order'];	
		}
	}
	return $vars;
});