Title: Query String with WooCommerce
Last modified: September 1, 2016

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# Query String with WooCommerce

 *  [emmgunn](https://wordpress.org/support/users/emmgunn/)
 * (@emmgunn)
 * [9 years, 11 months ago](https://wordpress.org/support/topic/query-string-with-woocommerce/)
 * Hi All,
    First a bit of a warning. I’m very much a newb when it comes to wordpress
   and php, so if you are able to offer assistance to the below, please use small
   words if possible :-).
 * On to the problem. I’ve got a wordpress website and am using WooCommerce to sell
   registrations for applications that I develop. To streamline the registration
   process, I would like users to be able to click a registration button in the 
   application and be taken directly to my WooCommerce checkout page with the registration
   product already loaded in the cart and a username (generated by the application)
   entered automatically in the checkout page’s username field (which I’ve added).
 * What I’ve got so far is, when the user clicks on the applications registration
   button, the application sends the user in their browser to a URL that looks like:
 *  [http://www.mysite.com/checkout/?add-to-cart=532&username=myname](http://www.mysite.com/checkout/?add-to-cart=532&username=myname)
 * In my function.php file I’m redirecting to the checkout when adding to cart, 
   so this opens the checkout page with the product id = 532 already in the cart.
   Perfect.
 * To make the username variable public, I added the following to my functions.php
   file:
 *     ```
       add_filter( 'query_vars', 'add_query_vars_filter' );
       function add_query_vars_filter( $vars ){
         $vars[] = "username";
         return $vars;
       }
       ```
   
 * To capture the username from the query string and enter it in a created username
   field, I also added the following to my functions.php file:
 *     ```
       add_filter( 'woocommerce_checkout_fields' , 'custom_override_checkout_fields' );
       function custom_override_checkout_fields( $fields ) {
   
       	$thename = get_query_var( 'username', 'defaultName' );
   
       	$fields['billing']['billing_username'] = array(
               	'label'     => __($label, 'woocommerce'),
           		'placeholder'   => _x($placeholder, 'placeholder', 'woocommerce'),
           		'required'  => true,
           		'class'     => array('form-row-wide'),
           		'clear'     => true,
       		'default'	=> $thename
           	);
   
            return $fields;
       }
       ```
   
 * Unfortunately, ‘defaultName’ is entered in the username field. If I remove the“
   add-to-cart=532” from the URL, then ‘myname’ is entered. I think that the problem
   is that by the time the checkout page opens, “username=myname” is stripped from
   the URL. It seems I have to use $thename = get_query_var( ‘username’, ‘defaultName’)
   earlier in the process of opening the checkout page (and one of the problems 
   is that I don’t fully understand this process) and somehow make it accessible
   in the custom_override_checkout_fields function in my functions.php file. So 
   the question is how do I accomplish this?
 * Thanks in advance for any help.

Viewing 7 replies - 1 through 7 (of 7 total)

 *  [Softound Solutions](https://wordpress.org/support/users/softound/)
 * (@softound)
 * [9 years, 11 months ago](https://wordpress.org/support/topic/query-string-with-woocommerce/#post-7478281)
 * Hi,
 * I will check the issue.
 *  [Softound Solutions](https://wordpress.org/support/users/softound/)
 * (@softound)
 * [9 years, 11 months ago](https://wordpress.org/support/topic/query-string-with-woocommerce/#post-7478294)
 * Hi,
 * Rename this “custom_override_checkout_fields” function and try this following
   function
 *     ```
       function custom_override_checkout_fields( $fields ) {
       	global $wp_query;
       	$thename = 'defaultName';
       	if(isset($wp_query->query_vars['username']) && !empty($wp_query->query_vars['username'])) {
       		$thename = $wp_query->query_vars['username'];
       	}
       	$fields['billing']['billing_first_name'] = array(
               	'label'     => __($label, 'woocommerce'),
           		'placeholder'   => _x($placeholder, 'placeholder', 'woocommerce'),
           		'required'  => true,
           		'class'     => array('form-row-wide'),
           		'clear'     => true,
       		'default'	=> $thename
           	);
   
            return $fields;
       }
       ```
   
 *  Thread Starter [emmgunn](https://wordpress.org/support/users/emmgunn/)
 * (@emmgunn)
 * [9 years, 11 months ago](https://wordpress.org/support/topic/query-string-with-woocommerce/#post-7478353)
 * Thanks for the response. I gave this a try and the username field is still set
   to “defaultName”.
 * Looking into this some more, I think that there is some redirecting going on 
   and so the “username=myname” is lost from the URL??? I’ve already got this code
   in the functions.php file to redirect straight to the checkout page when something
   is added to the cart:
 *     ```
       add_filter ('add_to_cart_redirect', 'redirect_to_checkout');
       function redirect_to_checkout() {
       	global $woocommerce;
       	$checkout_url = $woocommerce->cart->get_checkout_url();
       	return $checkout_url;
       }
       ```
   
 * So I tried to use $thename = get_query_var( ‘username’, ‘defaultName’ ); in the
   above function thinking I could use add_query_arg() to add the username to the
   redirect, but $thename is still set to “defaultName”. I also tried your suggestion
   inside this function.
 * I’m guessing that the “add-to-cart=532” is handled somewhere earlier in the WooCommerce
   code and is doing some redirecting on its own. Perhaps that is where I need to
   read the username variable. I just don’t know how to find that in the code, and
   to be honest, I’m not sure how I would get that information to my custom_override_checkout_fields
   function in the functions.php file. Global variables?
 *  Thread Starter [emmgunn](https://wordpress.org/support/users/emmgunn/)
 * (@emmgunn)
 * [9 years, 11 months ago](https://wordpress.org/support/topic/query-string-with-woocommerce/#post-7478366)
 * I figured it out. I modified the redirect function like so:
 *     ```
       add_filter ('add_to_cart_redirect', 'redirect_to_checkout');
       function redirect_to_checkout() {
       	global $woocommerce;
       	$checkout_url = $woocommerce->cart->get_checkout_url();
       	if ( ! empty( $_REQUEST['username'] ) ) {
       		$thename = $_REQUEST['username'];
       		$checkout_url = esc_url( add_query_arg('username', $thename, $checkout_url ) );
       	}
       	return $checkout_url;
       }
       ```
   
 * I’m not sure why $_REQUEST works, and the other methods I tried above do not??
 *  [Softound Solutions](https://wordpress.org/support/users/softound/)
 * (@softound)
 * [9 years, 11 months ago](https://wordpress.org/support/topic/query-string-with-woocommerce/#post-7478394)
 * do the above codes work ?
 *  Thread Starter [emmgunn](https://wordpress.org/support/users/emmgunn/)
 * (@emmgunn)
 * [9 years, 10 months ago](https://wordpress.org/support/topic/query-string-with-woocommerce/#post-7478431)
 * Yes. Now you’re making me nervous though. Do you see something questionable in
   my code?
 *  [aseifert](https://wordpress.org/support/users/aseifert/)
 * (@aseifert)
 * [9 years, 6 months ago](https://wordpress.org/support/topic/query-string-with-woocommerce/#post-8322346)
 * thanks a lot for the hint, [@emmgunn](https://wordpress.org/support/users/emmgunn/),
   this workaround solved a [related problem](https://wordpress.org/support/topic/combining-add-to-cart-url-param-with-google-analytics-campaigns-params/)
   I had!

Viewing 7 replies - 1 through 7 (of 7 total)

The topic ‘Query String with WooCommerce’ is closed to new replies.

## Tags

 * [query](https://wordpress.org/support/topic-tag/query/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 7 replies
 * 3 participants
 * Last reply from: [aseifert](https://wordpress.org/support/users/aseifert/)
 * Last activity: [9 years, 6 months ago](https://wordpress.org/support/topic/query-string-with-woocommerce/#post-8322346)
 * Status: not resolved

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