Force billing fields for Paid Memberships Pro for specific levels.

Force-billing-fields-for-authorize-net.php

<?php
/**
 * Force billing fields for specific levels (line 9) for Authorize.net and Paid Memberships Pro.
 * Add this code to your site by following these steps: https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

function al_force_billing_fields_pmpro_authorize_net( $fields ) {

    $levels_array = array( 1,3 ); // change this to levels that require billing fields.

    if ( isset( $_REQUEST['level'] ) && in_array( $_REQUEST['level'], $levels_array ) ) {

        global $bfirstname, $blastname, $baddress1, $bcity, $bstate, $bzipcode, $bcountry, $bphone, $bemail;

        $fields["bfirstname"] = $bfirstname;
        $fields["blastname"] = $blastname;
        $fields["baddress1"] = $baddress1;
        $fields["bcity"] = $bcity;
        $fields["bstate"] = $bstate;
        $fields["bzipcode"] = $bzipcode;
        $fields["bphone"] = $bphone;
        $fields["bemail"] = $bemail;
        $fields["bcountry"] = $bcountry;
    
    }

	return $fields;
}
add_action("pmpro_required_billing_fields", "al_force_billing_fields_pmpro_authorize_net", 30);