fix php worker bogus error on use keyword

Author: MarkSort

src/parser/lexer.js

@@ -16,6 +16,10 @@ PHP.Lexer = function( src, ini ) {
     openTag = (ini === undefined || (/^(on|true|1)$/i.test(ini.short_open_tag) ) ? /(\<\?php\s|\<\?|\<\%|\<script language\=('|")?php('|")?\>)/i : /(\<\?php\s|<\?=|\<script language\=('|")?php('|")?\>)/i),
         openTagStart = (ini === undefined || (/^(on|true|1)$/i.test(ini.short_open_tag)) ? /^(\<\?php\s|\<\?|\<\%|\<script language\=('|")?php('|")?\>)/i : /^(\<\?php\s|<\?=|\<script language\=('|")?php('|")?\>)/i),
             tokens = [
+            {
+                value: PHP.Constants.T_USE,
+                re: /^use(?=\s)/i
+            },
             {
                 value: PHP.Constants.T_ABSTRACT,
                 re: /^abstract(?=\s)/i