PEAR is the PHP Extension and Application Repository.
This manual is written in XML using the DocBook XML DTD, using DSSSL (Document Style and Semantics Specification Language) for formatting. The tools used for formatting HTML versions are Jade, written by James Clark and The Modular DocBook Stylesheets written by Norman Walsh.
The basic structure is based on the great work already done by the PHP documentation group. Read About the PHP manual for more details.
