# File lib/rouge/lexers/php.rb, line 64
      def self.keywords
        @keywords ||= Set.new %w(
          and E_PARSE old_function E_ERROR or as E_WARNING parent eval
          PHP_OS break exit case extends PHP_VERSION cfunction FALSE
          print for require continue foreach require_once declare return
          default static do switch die stdClass echo else TRUE elseif
          var empty if xor enddeclare include virtual endfor include_once
          while endforeach global __FILE__ endif list __LINE__ endswitch
          new __sleep endwhile not array __wakeup E_ALL NULL final
          php_user_filter interface implements public private protected
          abstract clone try catch throw this use namespace yield
        )
      end