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
 * @donate $9     https://businessbloomer.com/bloomer-armada/

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 PHP snippets at the bottom of your child theme functions.php file and CSS at the bottom of its style.css file. Make sure you know what you are doing when editing such files - if you need more guidance, please take a look at my guide "Should I Add Custom Code Via WP Editor, FTP or Code Snippets?" and my video tutorial "Where to Place WooCommerce Customization?"

Does this snippet (still) work?

Please let me know in the comments if everything went as expected. I would be happy to revise the snippet if you report otherwise (please provide screenshots). I have tested this code with Storefront theme, the WooCommerce version listed above and a WordPress-friendly hosting.

If you think this code saved you time & money, feel free to join 17,000+ WooCommerce Weekly subscribers for blog post updates and 250+ Business Bloomer supporters for 365 days of WooCommerce benefits. Thank you in advance!

Need Help with WooCommerce?

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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.

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

  1. Is it possible to add this guide
    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" );
    	   $order->set_billing_delivery_toggle( "4 Hours Delivery" );
    1. Hi Jamal, this only works for default WooCommerce fields

Questions? Feedback? Support? Leave your Comment Now!

If you are writing code, please wrap it between shortcodes: [php]code_here[/php]. Failure to complying with this (as well as going off topic, not writing in English, etc.) will result in comment deletion. You should expect a reply in about 2 weeks - this is a popular blog but I need to get paid work done first. Please consider joining BloomerArmada to get blog comment reply priority, ask me 1-to-1 WooCommerce questions and enjoy many more perks. Thank you :)

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