redirect for contact form 7

functions.php

// ADD TO FUNCTIONS.PHP OR require get_template_directory() . '/inc/custom_fuctions.php';

<?php
add_action('wpcf7_mail_sent', 'rdm_wpcf7_mail_sent');
function rdm_wpcf7_mail_sent($wpcf7)
{
	$on_sent_ok = $wpcf7->additional_setting('rdm_on_sent_ok', false);

	if (is_array($on_sent_ok) && count($on_sent_ok) > 0)
	{
		wp_redirect(trim($on_sent_ok[0]));
		exit;
	}
}
?>