Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [2005] Unknown MySQL server host 'db' (1)' in /var/www/html/todo/common.php:80
Stack trace:
#0 /var/www/html/todo/common.php(80): PDO->__construct('mysql:host=db;d...', 'root', 'wasbook')
#1 /var/www/html/todo/session.php(70): dblogin()
#2 /var/www/html/todo/session.php(25): DbSessionManager->open()
#3 /var/www/html/todo/badapp.php(11): DbSessionManager->__construct()
#4 /var/www/html/todo/common.php(118): BadApp->__construct()
#5 /var/www/html/todo/import.php(2): require_once('/var/www/html/t...')
#6 {main}
  thrown in /var/www/html/todo/common.php on line 80