Fill checkout fields values from URL variables in Woocommerce

Question

I have a URL with a lot of variables put in there using GET e.g. checkout/?FirstName=Test&LastName=Test&EmailAddress=Test

I was wondering how to prepopulate the fields on the WooCommerce checkout page using this information? i.e. get FirstName and fill out FirstName in WooCommerce Checkout?

Any help thanks

Answer 1

Here below is an example with billing first name and last name based on Get url variables for checkout fields.

Its based on your Url example: checkout/?FirstName=Test&LastName=Test&EmailAddress=Test

The code:

add_filter( 'woocommerce_checkout_get_value' , 'custom_checkout_get_value', 20, 2 );
function custom_checkout_get_value( $value, $imput ) {
    // Billing first name
    if(isset($_GET['FirstName']) && ! empty($_GET['FirstName']) && $imput == 'billing_first_name' )
        $value = esc_attr( $_GET['FirstName'] );

    // Billing last name
    if(isset($_GET['LastName']) && ! empty($_GET['LastName']) && $imput == 'billing_last_name' )
        $value = esc_attr( $_GET['LastName'] );

    // Billing email
    if(isset($_GET['EmailAddress']) && ! empty($_GET['EmailAddress']) && $imput == 'billing_email' )
        $value = sanitize_email( $_GET['EmailAddress'] );

    return $value;
}

Code goes in function.php file of your active child theme (or active theme). Tested and works.