PMPRO add Hide from Directory option to checkout page

pmpro-hide-from-dir-rh.php

<?php

function my_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(
        "pmpromd_hide_directory",    // Use existing metakey to hide from directory
        "checkbox",                 // type of field
        array(
        	"label"=>"Hide my profile from the member directory?",        
            "profile"=>false     // Set profile to false so no duplicate values are displayed
        ));

    //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");

?>

This code is deprecated. To achieve this with User Fields, please follow this guide instead -> https://www.paidmembershipspro.com/allow-members-to-optionally-exclude-their-profile-from-the-member-directory/