introduced php-do-not-use-semantic-imenu for disabling semantic-imenu

Setting php-do-not-use-semantic-imenu to t will force
imenu-create-index-function to be imenu-default-create-index-function
even if semantic-mode is enabled (would be semantic-create-imenu-index
otherwise due to php-mode being a derived mode of c-mode - see
lisp/cedet/semantic/bovine/c.el in emacs sources).

Author: fallchildren

php-mode.el

@@ -259,6 +259,16 @@ can be used to match against definitions for that classlike."
     "^\\s-*function\\s-+\\(\\(?:\\sw\\|\\s_\\)+\\)\\s-*(" 1))
   "Imenu generic expression for PHP Mode.  See `imenu-generic-expression'.")
 
+(defcustom php-do-not-use-semantic-imenu nil
+  "Customize `imenu-create-index-function' for `php-mode'.
+
+If using `semantic-mode' `imenu-create-index-function' will be
+set to `semantic-create-imenu-index' due to `c-mode' being its
+parent.  Set this variable to t if you want to use
+`imenu-default-create-index-function' even with `semantic-mode'
+enabled."
+  :type 'boolean)
+
 (defcustom php-site-url "http://php.net/"
   "Default PHP.net site URL.
 
@@ -1212,6 +1222,12 @@ After setting the stylevars run hooks according to STYLENAME
       (save-excursion
         (php-syntax-propertize-function (point-min) (point-max))))))
 
+(defvar-mode-local php-mode imenu-create-index-function
+  (if php-do-not-use-semantic-imenu
+      #'imenu-default-create-index-function
+    #'semantic-create-imenu-index)
+  "Imenu index function for PHP.")
+
 
 ;; Define function name completion function
 (defvar php-completion-table nil