Collect National Id Number

/**

 * Add a text field to the donation form.

 *

 * This field is added to the donor details section (by default, this is the section

 * with a header of "Your Details"). In the example below, we add a field that collects

 * the donor's national ID number, but you can adapt this to your own needs by making

 * the following changes:

 *

 * 1. Replace every instance of 'national_id_number' with 'your_field'.

 * 2. Replace the field's label of 'National ID Number' with your the label for your field.

 *

 * IMPORTANT: This snippet only works in Charitable 1.5 or above.

 *

 * Related examples:

 *

 * @see Register a text field (detailed example) - https://github.com/Charitable/library/blob/master/donation-form/register-new-donation-field-1.5.php

 * @see Register a checkbox field - https://github.com/Charitable/library/blob/master/donation-form/add-checkbox-field-to-donation-form.php

 * @see Register multiple fields - https://github.com/Charitable/library/blob/master/donation-form/register-multiple-donation-fields.php

 * @see The old way to add fields - https://github.com/Charitable/library/blob/master/donation-form/legacy/collect-national-id-number.php

 */

function ed_charitable_register_national_id_number_field() {

	if ( class_exists('charitable') ) : // check for class

    /**

     * Define a new text field.

     */

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

        'label' => __( 'National ID Number', 'charitable' ),

        'data_type' => 'user',

        'donation_form' => array(

            'show_after' => 'phone',

            'required'   => false,

        ),

        'admin_form' => true,

        'show_in_meta' => true,

        'show_in_export' => true,

        'email_tag' => array(

            'description' => __( 'The donor\'s national ID number' , 'charitable' ),

        ),

    ) );

    /**

     * Register the field.

     */

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

	endif;

}

add_action( 'init', 'ed_charitable_register_national_id_number_field' );