code: public static function getUserBrowser()
      {
          $user_agent = $_SERVER['HTTP_USER_AGENT'];
          $user_browser = 'unknown';
  
          if (false !== stripos($user_agent, 'MSIE') && false === stripos($user_agent, 'Opera')) {
              $user_browser = 'Internet Explorer';
          } elseif (false !== stripos($user_agent, 'Firefox')) {
              $user_browser = 'Mozilla Firefox';
          } elseif (false !== stripos($user_agent, 'Chrome')) {
              $user_browser = 'Google Chrome';
          } elseif (false !== stripos($user_agent, 'Safari')) {
              $user_browser = 'Apple Safari';
          } elseif (false !== stripos($user_agent, 'Opera')) {
              $user_browser = 'Opera';
          } elseif (false !== stripos($user_agent, 'Netscape')) {
              $user_browser = 'Netscape';
          }
  
          return $user_browser;
      }
docs: Get user browser
  
  @return string User browser
  @static