Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 12541 ORA-12541: TNS:리스너가 없습니다. in /home/uc/_Default/_Lib/class.db.pdo.php:1354 Stack trace: #0 /home/uc/_Default/_Lib/class.db.pdo.php(1354): PDOStatement->execute() #1 /home/uc/_Default/_Lib/class.db.pdo.php(1157): DBConnPDO->selectOne('select count(*)...') #2 /home/uc/_Default/_Module/_Extend/UCPotal/course.php(83): DBConnPDO->getList(Array) #3 /home/uc/_Default/_Module/_Extend/UCPotal/_mainModule.php(220): include('/home/uc/_Defau...') #4 /home/uc/www/home.php(279): include('/home/uc/_Defau...') #5 /home/uc/www/nursing2/index.php(1): include_once('/home/uc/www/ho...') #6 {main} thrown in /home/uc/_Default/_Lib/class.db.pdo.php on line 1354