In addition to books like this one, I write a free, biweekly (that's every two weeks) email newsletter called The SitePoint Tech Times. In it, I write about the latest news, product releases, trends, tips, and techniques for all technical aspects of Web development. If nothing else, you'll get useful PHP articles and tips, but if you're interested in learning other languages, you'll find it especially useful. Sign up to the Tech Times (and other SitePoint newsletters) at http://www.sitepoint.com/newsletter/.