Change Country Field To Hidden

/**

 * This code snipet shows how to change the Country field in the

 * donation form to a hidden field with a hard-coded default value.

 *

 * This shows in general how you can modify a donation field

 * using the Donation Fields API. The basic process involves

 * getting the field (shown below), then using the set() method

 * to change specific settings.

 */

add_action(

	'init',

	function() {

		// Get the field.

		$field = charitable()->donation_fields()->get_field( 'country' );

		// Make it a hidden field.

		$field->set( 'donation_form', 'type', 'hidden' );

		// Set the value to 'US'.

		$field->set( 'donation_form', 'value', 'US' );

		// Repeat the same in the admin donation form.

		$field->set( 'admin_form', 'type', 'hidden' );

		$field->set( 'admin_form', 'value', 'US' );

	},

	100

);