I do care a lot about IBM Informix products. You'll find here a few essays and some tech work regarding the Informix data servers and the 4GL language.
XML is an impressive technology: it is simple, it is useful. Those are good reasons explaining its wide acceptance. I started dealing with XML in early 2000, it was then barely a toddler. Now, XML is everywhere, from Office documents to databases, via development tools, data exchange, and many more…
PHP is a great language for doing plenty of things, including Web applications, batch applications. Its recent evolutions have made it even more interesting as you can use object orientation. Here is some reading around PHP.
XML (eXtensible Markup Language) and databases are really communicating with each other and that’s especially true with big names of the market such as IBM Informix Dynamic Server, Oracle, and, of course, IBM DB2 “Viper” featuring “pureXML”.