Adding a Custom Text Field to PMPro Checkout Page

my_pmpro_custom_text_field.php

<?php

/**
 * Register Helper example for five fields. This is a test Register Helper example.
 * Please add the below code to your custom plugin or Code Snippets Plugin by following this guide - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

function my_pmprorh_init() {
	//don't break if Register Helper is not loaded
	if(!function_exists( "pmprorh_add_registration_field" )) {
		return false;
	}
	
	$fields = array();
	$fields[] = new PMProRH_Field(
        'sport',		// input name, will also be used as meta key
        'text',			// type of field
        array(
           	'label' => "What Sport Are You Involved In?",
           	'required'  => true,    	// make this field required
           	'profile' => true,      	// show in user profile
		'memberslistcsv' => true, 	//includes in CSV export
        ));
	
	//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", "my_pmprorh_init","my_pmprorh_depends_fields_init");