Adding field before sending but after validation

How can I add a field before the form is sent, but after validation?

wpcf7_posted_data – fired before validation
wpcf7_before_send_mail – too late, I can’t modify or add fields

function action_wpcf7_before_send_mail($cf7) {

	$submission = WPCF7_Submission::get_instance();
	if ($submission) {
		$form_data = $submission->get_posted_data();
		$form_data['new-field'] = getSomeDataFromExternalApi();
		// now what?
	}
}

add_action('wpcf7_before_send_mail', 'action_wpcf7_before_send_mail', 10, 1);

• This topic was modified 4 years, 8 months ago by pepe80.