Set State Field To Us States Dropdown With Default

/**

 * Change the "State" field into a "Province" field.

 *

 * @param   array[] $fields

 * @return  array[]

 */

add_action(

	'init',

	function ( $fields ) {

		$fields = charitable()->donation_fields();

		$field  = $fields->get_field( 'state' );

		// Change it to a select/drop-down field.

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

		// Load all US states.

		$states = [

			'outside-usa' => 'Outside USA',

			'US States'   => include( charitable()->get_path( 'directory', true ) . 'i18n/states/US.php' ),

		];

		$field->set( 'donation_form', 'options', $states );

		// Set the default state.

		$field->set( 'donation_form', 'default', 'TX' );

		return $fields;

	}

);