Now, in the following sections, read on about how to make use of PHP's internals to build powerful extensions.

For even more powerful string handling and manipulating functions take a look at the POSIX regular expression functions and the Perl compatible regular expression functions.

Adding Hyperwave support to PHP should fill in the gap of a missing programming language for interface customisation. It implements all the messages as defined by the HG CSP but also provides more powerful commands to e.g. retrieve complete documents.