Warning: include(phpqrcode/qrlib.php): Failed to open stream: No such file or directory in /var/www/html/qr.php on line 3

Warning: include(): Failed opening 'phpqrcode/qrlib.php' for inclusion (include_path='.:/usr/local/lib/php') in /var/www/html/qr.php on line 3

Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/qr.php:3) in /var/www/html/qr.php on line 76

Fatal error: Uncaught Error: Class "QRcode" not found in /var/www/html/qr.php:80 Stack trace: #0 {main} thrown in /var/www/html/qr.php on line 80