UPDATE: the question i asked doesn\'t quite cover how deep i went in doing this upgrade! If you stumble on this, i hope the answer i pushed is useful to you
So, in an ef
I had this same problem after using the Cake Shell Upgrade tool. While our web app is large, we never customized the index.php file.
Replacing our myapp/app/webroot/index.php with the newly downloaded CakePHP cakephp-2.3.4/app/webroot/index.php solved this issue for me.
I'm not sure why the CakePHP Upgrade Shell or it's instructions don't specify to change the index.php file, but as @bharal's lengthy and great answer shows, there is a lot more work to do since the Upgrade Shell doesn't do everything.