WooCommerce: Set Checkout Field Value @ Order Creation

This is a very specific function. Sometimes, you need to “set” a checkout field value upon order creation (because it was not required and left empty for example). In some other cases, you might want to override what the customer input if you have certain requirements.

Either way, overriding the checkout fields on order creation is super easy. Here’s how it’s done – enjoy!

Set a checkout field value programmatically upon WooCommerce order creation

PHP Snippet: Set & Save a Checkout Field Programmatically Upon Order Creation

The “$order->set_$key( $value )” function comes to the rescue. Simply concatenate it with the shipping/billing field key in order to tell the system what key you should target. $value defines the value you should set this key to.

In the following example, I’m setting the “billing_city” to “Singapore” in case “Singapore” is the “billing_country”. Change “billing_city” to any other key to set that specific key.

/**
 * @snippet       Set checkout billing / shipping field - WooCommerce Order
 * @how-to        Get CustomizeWoo.com FREE
 * @author        Rodolfo Melogli
 * @compatible    WooCommerce 3.5.7
 * @community     https://businessbloomer.com/club/
 */

add_action( 'woocommerce_checkout_create_order', 'bbloomer_set_singapore_city', 9999, 2 );

function bbloomer_set_singapore_city( $order, $data ) {
	if ( $data['billing_country'] === 'SG' ) $order->set_billing_city( 'Singapore' );
}

Where to add custom code?

You should place custom PHP in functions.php and custom CSS in style.css of your child theme: where to place WooCommerce customization?

This code still works, unless you report otherwise. To exclude conflicts, temporarily switch to the Storefront theme, disable all plugins except WooCommerce, and test the snippet again: WooCommerce troubleshooting 101

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Rodolfo Melogli

Business Bloomer Founder

Author, WooCommerce expert and WordCamp speaker, Rodolfo has worked as an independent WooCommerce freelancer since 2011. His goal is to help entrepreneurs and developers overcome their WooCommerce nightmares. Rodolfo loves travelling, chasing tennis & soccer balls and, of course, wood fired oven pizza. Follow @rmelogli

4 thoughts on “WooCommerce: Set Checkout Field Value @ Order Creation

  1. Is it possible to add this guide
    https://businessbloomer.com/woocommerce-add-custom-field-product-variation/
    to the order page also?

    1. Hi Yossef, thanks so much for your comment! Yes, this is definitely possible, but I’m afraid it’s custom work. If you’d like to get a quote, feel free to contact me here. Thanks a lot for your understanding!

  2. For me its not working (:) and giving “Internal Server Error” on my checkout page after hitting “Place Order” button, however when i remove your code its working.

    add_action( 'woocommerce_checkout_create_order', 'bbloomer_set_delivery_field_values', 9999, 2 );
     
    function bbloomer_set_delivery_field_values( $order, $data ) {
       if ( $data['billing_delivery_toggle'] === "1" ) {
    	   $order->set_billing_delivery_toggle( "1 Hour Delivery" );
       }else{
    	   $order->set_billing_delivery_toggle( "4 Hours Delivery" );
    	   }
    }
    
    1. Hi Jamal, this only works for default WooCommerce fields

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