Set a Text Field Default Value

Hi,

The default value std helps you to show the value in appearance, this value is not saved to the database before publishing the post. Please read more here https://docs.metabox.io/creating-fields-with-code/#why-does-not-my-default-value-work

Hi,

There is no option to do that, but you can use the action hook rwmb_after_save_field to check the field value if it is empty and update a default value. Read more on the documentation https://docs.metabox.io/actions/rwmb-after-save-field/

Hi,

No need to use the function do_action() in your code, just see the examples below to hook a callback function to the action.

You can also read more on this documentation to know how to use the action hook https://developer.wordpress.org/plugins/hooks/actions/