Fatal error: Uncaught PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'device_id' in 'where clause' in C:\xampp\htdocs\public\index.php:12 Stack trace: #0 C:\xampp\htdocs\public\index.php(12): PDOStatement->execute(Array) #1 C:\xampp\htdocs\server.php(21): require_once('C:\\xampp\\htdocs...') #2 {main} thrown in C:\xampp\htdocs\public\index.php on line 12