Fatal error: Uncaught TypeError: fwrite(): Argument #1 ($stream) must be of type resource, bool given in /var/www/html/master/pub_calcolatrice.php:16 Stack trace: #0 /var/www/html/master/pub_calcolatrice.php(16): fwrite() #1 {main} thrown in /var/www/html/master/pub_calcolatrice.php on line 16