If you want to start learning PHP and MySql, the first step is to setup complete environment on your local computer. This will include Apache web server with PHP support and MySql database server.
If your phone doesn't want to boot up again after the update, it gets stuck in a black screen, follow this tutorial where we root the Galaxy SII with Odin and put an official Samsung Android 4 ICS on it.
Image having a Google Calendar at your hand and disposal in a matter of only one click. Pretty nice I would say, let me introduce you to this mighty useful Google Chrome extension.