Prism.languages.insertBefore('php', 'variable', {
	'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': /\b(?:parent|self|static)\b/,
			'punctuation': /::|\\/
		}
	}
});