I highly recommend buying Teach Yourself PHP in 24 Hours. It is going to be far more useful to you than an online tutorial, and it has the advantage of covering some basic MySQL as well - combining PHP and MySQL is how you do the really cool stuff.
I learned PHP from that book. It starts you off with some simple scripts, and by the 10th hour you will find yourself quite comfortable.
Don’t forget that you need IIS or Apache on your computer if you want to run PHP and test things locally. The book covers the installation of PHP.
There are some basic scripts taking shape on the new wiki. See this page for details.
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