This may very well be an intended feature, but I thought it best to bring attention to it just in case.
As seen in the attached screenshot, when a set of <?php ?> tags are placed in the value string of an HTML attribute, they take on a shade of the value strings’ text coloring, instead of maintaining their original <?php ?> coloring.
I did a double-take when I first noticed this, and it felt off to me. However, I definitely understand if this is intended to provide additional context for such scripting tags.