Warning: Undefined array key "HTTP_CF_CONNECTING_IP" in /var/www/test/index.php on line 3

Warning: Undefined array key "HTTP_CF_CONNECTING_IP" in /var/www/test/index.php on line 4

Fatal error: Uncaught mysqli_sql_exception: Duplicate entry '' for key 'PRIMARY' in /var/www/test/index.php:4 Stack trace: #0 /var/www/test/index.php(4): mysqli_query() #1 {main} thrown in /var/www/test/index.php on line 4