PHP extras: Improved scope and this (#3243)

Author: RunDevelopment

components/prism-php-extras.js

@@ -1,11 +1,14 @@
 Prism.languages.insertBefore('php', 'variable', {
-	'this': /\$this\b/,
+	'this': {
+		pattern: /\$this\b/,
+		alias: 'keyword'
+	},
 	'global': /\$(?:GLOBALS|HTTP_RAW_POST_DATA|_(?:COOKIE|ENV|FILES|GET|POST|REQUEST|SERVER|SESSION)|argc|argv|http_response_header|php_errormsg)\b/,
 	'scope': {
 		pattern: /\b[\w\\]+::/,
 		inside: {
-			keyword: /parent|self|static/,
-			punctuation: /::|\\/
+			'keyword': /\b(?:parent|self|static)\b/,
+			'punctuation': /::|\\/
 		}
 	}
 });