Fatal error: Uncaught TypeError: implode(): Argument #1 ($array) must be of type array, string given in /www/wwwroot/www.educads.com/apps/frontend/controllers/CoursesController.php:656 Stack trace: #0 /www/wwwroot/www.educads.com/apps/frontend/controllers/CoursesController.php(656): implode() #1 [internal function]: Multiple\Frontend\Controllers\CoursesController->showAction() #2 [internal function]: Phalcon\Dispatcher\AbstractDispatcher->callActionMethod() #3 [internal function]: Phalcon\Dispatcher\AbstractDispatcher->dispatch() #4 /www/wwwroot/www.educads.com/public/index.php(36): Phalcon\Mvc\Application->handle() #5 {main} thrown in /www/wwwroot/www.educads.com/apps/frontend/controllers/CoursesController.php on line 656