add website URL field to RCP

/**
 * Adds the custom fields to the registration form and profile editor
 *
 */
function pw_rcp_add_user_fields() {

    $website_url = get_user_meta( get_current_user_id(), 'rcp_website_url', true );


    ?>
    <p>
        <label for="rcp_website_url"><?php _e( 'Your Website URL', 'rcp' ); ?></label>
        <input name="rcp_website_url" id="rcp_website_url" type="text" value="<?php echo esc_attr( $website_url ); ?>"/>
    </p>

    <?php
}
add_action( 'rcp_after_password_registration_field', 'pw_rcp_add_user_fields' );
add_action( 'rcp_profile_editor_after', 'pw_rcp_add_user_fields' );

/**
 * Adds the custom fields to the member edit screen
 *
 */
function pw_rcp_add_member_edit_fields( $user_id = 0 ) {

    $website_url = get_user_meta( $user_id, 'rcp_website_url', true );


    ?>
    <tr valign="top">
        <th scope="row" valign="top">
            <label for="rcp_website_url"><?php _e( 'website_url', 'rcp' ); ?></label>
        </th>
        <td>
            <input name="rcp_website_url" id="rcp_website_url" type="text" value="<?php echo esc_attr( $website_url ); ?>"/>
            <p class="description"><?php _e( 'The member\'s website URL', 'rcp' ); ?></p>
        </td>
    </tr>

    <?php
}
add_action( 'rcp_edit_member_after', 'pw_rcp_add_member_edit_fields' );



/**
 * Determines if there are problems with the registration data submitted
 *
 */
function pw_rcp_validate_user_fields_on_register( $posted ) {

    if( empty( $posted['rcp_website_url'] ) ) {
        rcp_errors()->add( 'invalid_website_url', __( 'Please enter your website URL', 'rcp' ), 'register' );
    }

}
add_action( 'rcp_form_errors', 'pw_rcp_validate_user_fields_on_register', 10 );


/**
 * Stores the information submitted during registration
 *
 */
function pw_rcp_save_user_fields_on_register( $posted, $user_id ) {

    if( ! empty( $posted['rcp_website_url'] ) ) {
        update_user_meta( $user_id, 'rcp_website_url', sanitize_text_field( $posted['rcp_website_url'] ) );
    }

}
add_action( 'rcp_form_processing', 'pw_rcp_save_user_fields_on_register', 10, 2 );


/**
 * Stores the information submitted profile update
 *
 */
function pw_rcp_save_user_fields_on_profile_save( $user_id ) {

    if( ! empty( $_POST['rcp_website_url'] ) ) {
        update_user_meta( $user_id, 'rcp_website_url', sanitize_text_field( $_POST['rcp_website_url'] ) );
    }

}
add_action( 'rcp_user_profile_updated', 'pw_rcp_save_user_fields_on_profile_save', 10 );
add_action( 'rcp_edit_member', 'pw_rcp_save_user_fields_on_profile_save', 10 );


// display the info in the members list
function website_url_add_table_header_footer() {
    ?>
    <th class="rcp-website_url-col"><?php _e('Website URL', 'rcp'); ?></th>
    <?php
}
add_action('rcp_members_page_table_header', 'website_url_add_table_header_footer');
add_action('rcp_members_page_table_footer', 'website_url_add_table_header_footer');

function website_url_add_row($user_id) {
    ?>
    <td><?php echo get_user_meta($user_id, 'rcp_website_url', true); ?></td>
    <?php
}
add_action('rcp_members_page_table_column', 'website_url_add_row');