Chapter 9. Web Application Development

Like the previous two chapters—which also discussed various techniques for polishing Web applications—this one will cover a handful of topics for developing sites and bringing them to the next level: debugging, error management, and improving performance.

When developing Web applications with PHP and MySQL you end up with potential bugs in one of four or more technologies. You could have HTML issues, PHP problems, SQL errors, or MySQL mistakes. To be able to fix the bug, you must first determine what exactly is causing it. The first two sections of this chapter will itemize the best PHP and MySQL debugging principles (many of which you may have already figured out). The two error-management sections (one ...

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