Config Wordpress SMTP for MailHog - test your emails local

wp-mailhog-config-smtp.php

/*
   * Add the MailHog to your wordpress projects
   * By Khalid Ahmada
   * MailHog @see https://github.com/mailhog/MailHog
   */

  class WP_MAILHOG
  {

    function __construct()
    {
      // Config only on local
      if ($this->isLocal()) {
        $this->AddSMTP();
      }

    }


    /**
     * Config Your local rule
     * default is check if the host is *.test or  *.local
     * @return bool
     */
    private function isLocal()
    {

      if (defined('WP_HOME')) {
        if (strpos(WP_HOME, '.test') !== false ||
          strpos(WP_HOME, '.local') !== false
        ) {
          return true;
        }
      }

      return false;

    }

    /*
     * Wordpress default hook to config php mail
     */
    private function AddSMTP()
    {
      add_action('phpmailer_init', array($this, 'configEmailSMTP'));
    }


    /*
     * Config MailTramp SMTP
     */
    public function configEmailSMTP(PHPMailer $phpmailer)
    {
      $phpmailer->IsSMTP();
      $phpmailer->Host='127.0.0.1';
      $phpmailer->Port=1025;
      $phpmailer->Username='';
      $phpmailer->Password='';
      $phpmailer->SMTPAuth=true;

    }
  }

  new WP_MAILHOG();

Thanks for the snippet, but it gives me following error:
PHP Fatal error: Uncaught TypeError: WP_MAILHOG::configEmailSMTP(): Argument #1 ($phpmailer) must be of type PHPMailer, PHPMailer\PHPMailer\PHPMailer given

Just found the solution:

    public function configEmailSMTP(PHPMailer\PHPMailer\PHPMailer $phpmailer)
    {
        $phpmailer->IsSMTP();
        $phpmailer->Host = '127.0.0.1';
        $phpmailer->Port = 1025;
        $phpmailer->Username = '';
        $phpmailer->Password = '';
        $phpmailer->SMTPAuth = true;
    }