blank webpage on the webbrowser

[OrionRandD]

-> foo@dino 10:28:36
/var/www/html/templates $ ll
total 44K
-rw-r--r-- 1 foo foo 31K nov 17 10:28 favicon.ico
-rw-rw-r-- 1 foo foo 117 nov 16 10:16 footer.php
-rw-rw-r-- 1 foo foo 736 nov 17 10:26 header.php
-rw-rw-r-- 1 foo foo 495 nov 16 15:14 index.php
-> foo@dino 10:28:38
/var/www/html/templates $ php -S localhost:8000
[Sun Nov 17 10:28:45 2024] PHP 8.2.24 Development Server (http://localhost:8000) started
[Sun Nov 17 10:28:54 2024] [::1]:32876 Accepted
[Sun Nov 17 10:28:54 2024] [::1]:32876 [200]: GET /
[Sun Nov 17 10:28:54 2024] [::1]:32876 Closing
[Sun Nov 17 10:28:57 2024] [::1]:32884 Accepted
[Sun Nov 17 10:28:57 2024] [::1]:32884 [200]: GET /
[Sun Nov 17 10:28:57 2024] [::1]:32884 Closing
[Sun Nov 17 10:29:50 2024] [::1]:37880 Accepted
[Sun Nov 17 10:29:50 2024] [::1]:37880 [200]: GET /
[Sun Nov 17 10:29:50 2024] [::1]:37880 Closing

I do not get anything in my browser...
Just a blank web page...
I am using Linux/Debian (php, mysql and apache2 work all right on other files)
:(