Fatal error: Uncaught mysqli_sql_exception: Unknown column '7235�' in 'where clause' in C:\D-Drive\vcasmo.com\php\class_Database.php:42 Stack trace: #0 C:\D-Drive\vcasmo.com\php\class_Database.php(42): mysqli->query('(select title, ...') #1 C:\D-Drive\vcasmo.com\php\vcasmo\presentation\Presentation.php(439): Database->queryObject('(select title, ...') #2 C:\D-Drive\vcasmo.com\video_watch.php(329): Presentation->getPreivousNextPresentationFromUser('6497', '7235\xEF\xBF\xBD', false, false) #3 {main} thrown in C:\D-Drive\vcasmo.com\php\class_Database.php on line 42