Add Multiple Checkboxes To Donation Form

/**

 * Add a collection of checkboxes to the donation form.

 *

 * This snippet only works in Charitable 1.5 or above.

 *

 */

function wpchar_charitable_register_new_checkboxes_field() {

    if ( ! class_exists("Charitable_Donation_Field" ) ) {

	return;

    };

    /**

     * Define a new checkbox field.

     */

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

        'label' => __( 'New Checkboxes Field', 'charitable' ),

        'data_type' => 'user',

        'donation_form' => array(

            'type' => 'multi-checkbox',

            'show_before' => 'phone',

            'required'   => false,

            'options' => array (

                 'option_1_value' => 'Option One',

                 'option_2_value' => 'Option Two',

                 'option_3_value' => 'Option Three',

	     ),

        ),

        'admin_form' => true,

        'show_in_meta' => true,

        'show_in_export' => true,

        'email_tag' => array(

            'description' => __( 'The new checkbox field' , 'charitable' ),

        ),

    ) );

    /**

     * Register the checkbox field.

     */

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

}

add_action( 'init', 'wpchar_charitable_register_new_checkboxes_field' );