Custom fields at membership checkout for support ticket.

butlercountyogs_pmprorh_init.php

<?php
/**
 * Custom fields at membership checkout for support ticket.
 *
 * Requires: Paid Memberships Pro, Register Helper Add On.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function butlercountyogs_pmprorh_init() {
    //don't break if Register Helper is not loaded
    if ( ! function_exists( "pmprorh_add_registration_field" ) ) {
        return false;
    }
    //define the fields
    $fields = array();
    $fields[] = new PMProRH_Field(
        "surnames",
        "textarea",
        array(
            "label"=>"Surnames you are researching",
            "profile"=>true,
        ));
    $fields[] = new PMProRH_Field(
        "newletter_type",
        "radio",
        array(
            "label"=>"Newsletter Format",
			"options"=>array(
				"email"=>"Email",
				"mail"=>"Physical Mail",
			),
            "profile"=>true,
        ));

    //add the fields into a new checkout_boxes are of the checkout page
    foreach($fields as $field)
        pmprorh_add_registration_field(
            "checkout_boxes", // location on checkout page
            $field            // PMProRH_Field object
        );
    //that's it. see the PMPro Register Helper readme for more information and examples.
}
add_action("init", "butlercountyogs_pmprorh_init");