Fatal error: Uncaught PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'p.user_id' in 'on clause' in /var/www/html/AjA/index.php:14 Stack trace: #0 /var/www/html/AjA/index.php(14): PDO->query('SELECT p.*, u.u...') #1 {main} thrown in /var/www/html/AjA/index.php on line 14