I wrote a extension to add callback to any functions

The extension named funcall.The source release and example can be found on http://code.google.com/p/funcall/. There are 3 functions in this extension currently. fc_add_pre, add callback which will be called before certain function call. fc_add_post, add callback which will be called after certain function call. fc_list,return a array contain the callbacks info. funcall is like the http://pecl.php.net/package/intercept, but funcall is more powerful(callback can get function args, return_value and processing time) and stable(there are some bugs in intercept and never being fixed). I want to add this funcall extension to pecl directory,so I announced it here.