Warning: fopen(counter.txt): Failed to open stream: Permission denied in /var/www/html/index.php on line 22
Fatal error: Uncaught TypeError: fwrite(): Argument #1 ($stream) must be of type resource, false given in /var/www/html/index.php:23
Stack trace:
#0 /var/www/html/index.php(23): fwrite()
#1 {main}
thrown in /var/www/html/index.php on line 23