Hook um_submit_post_form

um_submit_post_form.php

<?php

/**
 * Hook: um_submit_post_form
 *
 * Type: filter
 *
 * Description: Change submitted data on form submit.
 * May be used to modify or save raw input data before the data sanitize.
 *
 * @example https://github.com/ultimatemember/ultimatemember/blob/master/includes/core/class-form.php#L448
 * @link    https://docs.ultimatemember.com/article/1282-umsubmitpostform
 *
 * @package um\core
 * @see     um\core\Form::form_init()
 * @since   2.0
 * @version 3.0
 *
 * @param array $data Submitted data.
 *
 * @return array Submitted data.
 */
function my_submit_post_form( $data ) {
	// your code here.
	return $data;
}
add_filter( 'um_submit_post_form', 'my_submit_post_form', 10, 1 );