How to implement processing (validation) of a custom form tag (shortcode) in Contact form 7?

Question

WordPress

Added a shortcode (form field) using this function:
wpcf7_add_form_tag();
How now to add processing (rule for validation)?
Is there any way to do this without changing the code of the plugin itself?

Answer 1

You can use filters wpcf7_validate_НАЗВАНИЕ_ТЕГАand wpcf7_validate_НАЗВАНИЕ_ТЕГА*.
Example .

Answer 2

Use wpcf7_before_send_mail hook in functions.php before
sending