Warning: Undefined array key "username" in /home/gulfamte/public_html/profile.php on line 11

Fatal error: Uncaught mysqli_sql_exception: Unknown column 'user_id' in 'where clause' in /home/gulfamte/public_html/profile.php:14 Stack trace: #0 /home/gulfamte/public_html/profile.php(14): mysqli_query() #1 {main} thrown in /home/gulfamte/public_html/profile.php on line 14