Web Staion and php support

Hello Will,
I just got a ds1522+ and working on several services installation. After installing Web Station and php 7.x and 8.x, I tried the standard phpinfo() test to verify everything works. I put this function call in a index.html file and there is no way to make it work. Did I miss any additional step to have PHP working?

Update: by using chrome debugging tool I discovered my “<?php” and “?>” tags got unrecognized and replaced with “<!–?php” and “?—>”, aka as comments. Why? Any clue?