Codewalkers.com has made an update to their tutorials section with the introduction of three new articles:

• Controlling PHP - a tour of the various ways to fine tune your php installation.
• Mail() from Start to Finish - explains everything you'll need to know about sending emails with PHP.
• E-mail Validation with PHP - illustrates address validation using regular expressions and MX records!

Each of these are great topics, and are ones I get asked about all the time. It will be nice to a good place to point other coders to for this information...