Fatal error: Uncaught mysqli_sql_exception: Unknown column 'category' in 'where clause' in /workspace/category.php:14 Stack trace: #0 /workspace/category.php(14): mysqli->prepare('\r\n\tSELECT p.id,...') #1 /workspace/index.php(73): include('/workspace/cate...') #2 {main} thrown in /workspace/category.php on line 14