Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, mysqli_result given in /var/www/html/php/functions.php:37 Stack trace: #0 /var/www/html/php/header.php(9): build_head(Object(mysqli_result)) #1 /var/www/html/index.php(22): require_once('/var/www/html/p...') #2 {main} thrown in /var/www/html/php/functions.php on line 37