Format the Phone number of Paid Memberships Pro

pmpro_format_my_phone.php

<?php 
/**
 * This code gist illustrates a way to customize the format of your members phone number.
 *
 * In this example, we will change the PMPro phone number from
 *
 *  (123)456-7890
 *   to  1234567890
 *
 * Adjust this code gist to suit your needs for phone number.
 *
 * We will be hooking into the pmpro_format_phone_filter. For more on this filter, please see: https://www.paidmembershipspro.com/hook/pmpro_format_phone/
 *
 * Add this code below to your PMPro Customizations Plugin
 *  - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

function pmpro_format_my_phone( $phone ) {
    
    $r = cleanPhone( $phone );
        if ( strlen( $r ) == 11 ) {
            $r = substr( $r, 0, 1 ) . '' . substr( $r, 1, 3 ) . '' . substr( $r, 4, 3 ) . '' . substr( $r, 7, 4 );
        } elseif ( strlen( $r ) == 10 ) {
            $r = '' . substr( $r, 0, 3 ) . '' . substr( $r, 3, 3 ) . '' . substr( $r, 6, 4 );
        } elseif ( strlen( $r ) == 7 ) {
            $r = substr( $r, 0, 3 ) . '' . substr( $r, 3, 4 );
        }
        /**
         * Filter to do more or less cleaning of phone numbers.
         *
         * @since 1.8.4.4
         *
         * @param string $r The formatted phone number.
         * @param string $phone The original phone number.
         */
        return $r;
}

add_filter( 'pmpro_format_phone', 'pmpro_format_my_phone' );

This recipe is included in the blog post on "How to format the member phone number field using a filter." at Paid Memberships Pro here: https://www.paidmembershipspro.com/how-to-format-the-member-phone-number-field-using-a-filter/