[PHP] When code begins with class, class-name after it is not matched.

[TomPavelec]

Information

• Language: PHP
• Plugins: none

Description
When code begins with class | interface | trait the class-name after it is not matched.
When an whitespace is added before class the class-name is matched correctly.

I know that correct php code starts with <?php and then first class-name is matched correctly.
But opening tag is often dropped in code snippets fot better readability (blogs, docs, ..) and then this is an issue.

Code snippet

The code being highlighted incorrectly. Class name `First` is not matched.

class First {}
class Second {}

[RunDevelopment]

I'm late to reply, but here's an explanation of the bug:

The problem is that Prism lookbehinds don't actually look behind. Prism knows that greedy matches that start inside existing tokens will be discarded, so it skips over them (using lastIndex). This means that the class name pattern won't start matching at the start of the string but after the first class keyword. Since Prism lookbehinds can't look behind, they have no way of accessing the first class keyword and move on to find the second class keyword and Second.

The solution is to match all keyword-dependent class names before keywords are matched. That way you also don't need greedy matching.
(This is how we do it in most languages.)