Update php-scanner.yaml

Fixed the GLOBALS matchers, so that a case like https://srcincite.io/blog/2021/09/30/chasing-a-dream-pwning-the-biggest-cms-in-china.html wouldn't be missed.

file/php/php-scanner.yaml

@@ -105,15 +105,21 @@ file:
         regex:
           - 'import_request_variables'
       - type: regex
-        # Avoid use of $GLOBALS
+        # Avoid use of GLOBALS
         regex:
-          - '\\$GLOBALS'
+          - 'GLOBALS'
       - type: regex
         regex:
-          - '\\$_GET'
+          - '_GET'
       - type: regex
         regex:
-          - '\\$_POST'
+          - '_POST'
+      - type: regex
+        regex:
+          - '_COOKIE'
+      - type: regex
+        regex:
+          - '_SESSION'
       - type: regex
         # Ensure the use of type checking validating against booleans (===)
         regex: