When building XML-enabled PHP/Oracle applications, the database can not only be used as an efficient means for storing XML data, but also to operate on any kind of data that can be expressed in XML.
In this chapter you learned how to use XML techniques and technologies available in PHP and Oracle when building XML-enabled PHP/Oracle applications. In particular, you saw how to use PHP's XML extensions and how to take advantage of Oracle XML DB, a set of Oracle XML technologies making Oracle Database an ideal choice for data-driven XML applications.
By now you should have a good understanding of how you can use XML techniques and technologies available in PHP and Oracle to build robust XML-enabled PHP applications on Oracle Database. Armed with this knowledge, you will be able to understand better XML Web Services discussed in the next chapter.