Contact Form 7 - Redirect after submission - Redirect user to new page after successful submission of a Contact Form 7 form. http://www.damiencarbery.com/2020/06/contact-form-7-redirect-after-submission/

cf7-redirect-after-submission.php

<?php
/*
Plugin Name: Contact Form 7 - Redirect after submission
Plugin URI: http://www.damiencarbery.com/2020/06/contact-form-7-redirect-after-submission/
Description: Redirect user to new page after successful submission of a Contact Form 7 form.
Author: Damien Carbery
Version: 0.1
*/


class CF7RedirectionAfterSubmit {
	private $redirection_urls;  // Store form id => redirection url.
	private $active_forms;  // Store IDs of forms on the displayed page.


	public function __construct() {
		// Change these IDs and urls for your site.
		$this->redirection_urls = array(
			10 => 'http://mydomain.com/redirect-for-form-ten/',
			18 => 'http://anotherdomain.com/thank-you-form-eighteen/',  // You can redirect to another site.
		);

		$this->active_forms = array();

		$this->init();
	}


	// Set up actions.
	public function init() {
		add_action( 'wpcf7_contact_form', array( $this, 'store_form_ids' ) );

		add_action( 'wp_footer', array( $this, 'redirection_js' ) );
	}


	// Store IDs of forms active on the current page.
	public function store_form_ids( $cfg_obj ) {
		$this->active_forms[] = $cfg_obj->id();
	}


	// Create JavaScript code for active forms.
	public function redirection_js() {
		// Remove duplicate values, in case a form is used more than once on the page.
		$this->active_forms = array_unique( $this->active_forms );

		// Obviously only continue if there are CF7 forms on this page.
		if ( count( $this->active_forms ) ) {
			// Check if any of the forms have redirects.
			$redirection_set = false;
			foreach ( $this->active_forms as $id ) {
				if ( array_key_exists( $id, $this->redirection_urls ) ) {
					$redirection_set = true;
				}
			}
			
			if ( $redirection_set ) {
				// Print JS.
?>
<script>
document.addEventListener( 'wpcf7submit', function( event ) {
<?php
				// Write out the relevant redirect for each form.
				foreach ( $this->active_forms as $id ) {
					if ( array_key_exists( $id, $this->redirection_urls ) ) {
?>
  if ( '<?php echo $id; ?>' == event.detail.contactFormId ) {
	  location.replace( '<?php echo $this->redirection_urls[ $id ]; ?>' );
  }
<?php
					}
				}
?>
}, false );
</script>
<?php
			}
		}
	}
}

$CF7RedirectionAfterSubmit = new CF7RedirectionAfterSubmit();