[Steven Zahm]

@ William

Understood…

The best way to handle this which will require a bit more up front work but will be update safe is to add your own metabox for phone numbers à la the “Education Levels” extension and then unregister the core phone numbers metabox so you only have one with your modifications. And most of the work is simply copy/pasting.

I would copy the entire code for the phone numbers metabox:
https://github.com/Connections-Business-

• Directory/Connections/blob/8.2.1/includes/class.metabox-entry.php#L1739

Make your changes and register it using the same array attributes:
https://github.com/Connections-Business-

• Directory/Connections/blob/8.2.1/includes/class.metabox-entry.php#L144

Use this method to do the actual metabox registration:

• https://github.com/Connections-Business-Directory/Connections/blob/8.2.1/includes/class.metabox-entry.php#L56

To unregister the core phone number field, this should work:

cnMetaboxAPI::remove( 'metabox-phone' );

You can hook into the cn_metabox hook to make this happen:

add_action( 'cn_metabox', array( 'cnEntryMetabox', 'init' ), 10 );

Step by step:

1. Hook a new function to the cn_metabox hook.
2. The function should unregister the metabox-phone metabox.
3. Set up an array with the exact same attributes.
4. Register your custom phone metabox.

Hope that helps.