title: PHP Notice: Constant FLD_EMAIL already defined laravel
body: <p>I have created a file called <code>db-constant.php</code> in conifg directory in laravel , this file contains my constants,then i added this line <code>require_once 'db-constants.php';</code> in <code>app.php</code> ,the problem is where i type php artisan cache:clear or any command this message will appear</p>
  
  <p>PHP Notice:  Constant FLD_EMAIL already defined in /var/www/html/test/config/db-constants.php on line 1</p>
  
  <p>how can i fix this ?</p>