SGLFLTS - DateTime : tomorrow and yesterday (symfony2)

SGL\FLTSBundle\Controller\ReportController.php

       // string input ($date = '2013-01-01';)
       
       $day = \DateTime::createFromFormat('Y-m-d', $date);
       $date_errors = \DateTime::getLastErrors();

       if ($date_errors['warning_count'] + $date_errors['error_count'] > 0) {
           throw $this->createNotFoundException('Input date does not exist.');
       }

       $next_day = clone $day;
       $next_day->add(new \DateInterval('P1D'));

       $previous_day = clone $day;
       $previous_day->sub(new \DateInterval('P1D'));