Add Campaign Creator Name Donation Export

/**

 * In this example, the campaign creator's name is added to the Donations

 * export, so it's easy to see who created the campaign that received the

 * donation when exporting the donations.

 */

add_action( 'init', function() {

	$field = new Charitable_Donation_Field( 'campaign_creator', array(

		'label'          => 'Campaign Creator',

		'admin_form'     => false,

		'show_in_export' => true,

		'email_tag'      => false,

		'value_callback' => function( Charitable_Abstract_Donation $donation ) {

			$creator_id = get_post_field( 'post_author', current( $donation->get_campaign_donations() )->campaign_id );

			return charitable_get_user( $creator_id );

		},

	) );

	charitable()->donation_fields()->register_field( $field );

} );