This is an XML parser based on PHP's built-in xml extension.
It supports two basic modes of operation: "func" and "event".
In "func" mode, it will look for a function named after
each element (xmltag_ELEMENT for start tags and xmltag_ELEMENT_
for end tags), and in "event" mode it uses a set of generic
callbacks.
PR: ports/56446
Submitted by: Alex Miller <asm@asm.kiev.ua>