When implementing code like i.e.
<!DOCTYPE html>
<html>
<body>
<?php
echo "My first PHP script!";
?>
</body>
</html>
Next to <?php
it gives red X icon with error that "<" missing '>' for end of tag. I did find some older threads about this here at stackoverflow, but there wasn't really any solution or response at all. I tried the solution of adding PHP Source Editor for .html and setting it as default, but looks like it doesn't work.
It's not a deal breaker, it's just I don't like red icons and false errors throughout the code.