WPCF7 Check spam before Sending email

wp-cf7-detect-spam-before-sending.php

<?php
// Untested : Detect spam before sending, in CF7 Plugin
// source : https://newburynew.media/contact-form-7-before-send-mail-example/

function wpcf7_register_user($wpcf7){

  $formid = 1;

  $submission = WPCF7_Submission::get_instance();

  if ( $submission ) {
      $posted_data = $submission->get_posted_data();
  }

  if($wpcf7->id() == $formid) {
    
    $message = sanitize_textarea_field($posted_data['your-message']);

    if( !empty($message) ) {

      // ok : sned email ?

    } else {
      
      // Include a spam detector here ?
      
      $error = true;
      $err_msg = 'Message error'; 
    
    }

  } // if wpcf7 id

  if(isset($error) && $error === true) {  

    $msgs = $wpcf7->prop('messages');

    $msgs['mail_sent_ok'] = $err_msg;

    $wpcf7->set_properties(array('messages' => $msgs));

    add_filter('wpcf7_skip_mail', 'abort_mail_sending');  

  } 

  return $wpcf7;

}

add_action('wpcf7_before_send_mail','wpcf7_register_user');

function abort_mail_sending($contact_form){

  return true;

}

?>