I have already started designing about some parts.

• Add php-errorcontrol-op face #519 Add php-errorcontrol-op face
• Reclassify keywords and types #520 Reclassify keywords and types

Our goal is to provide users with a functional highlighting that does not compromise the performance of Emacs. Therefore, it is possible to break compatibility from the past.

What is a "functional highlight"? Look at the following image.

Unless you're an PHP syntax expert, you won't be able to intuitively understand syntactic meaning from displayed colors.