PECL is a repository of PHP extensions that
   are made available to you via the PEAR
   packaging system.  This section of the manual is intended to demonstrate
   how to obtain and install PECL extensions.
  
   These instructions assume /your/phpsrcdir/ is the path
   to the PHP source distribution, and that extname is the name of the
   PECL extension.  Adjust accordingly.  These instructions also assume a 
   familiarity with the pear command.
  
   To be useful, a shared extension must be built, installed, and loaded.  The
   methods described below provide you with various instructions on how to
   build and install the extensions, but they do not automatically load them.
   Extensions can be loaded by adding an extension directive.  To this php.ini
   file, or through the use of the dl() function.
  
   When building PHP modules, it's important to have known-good versions 
   of the required tools (autoconf, automake, libtool, etc.) See the 
   Anonymous CVS Instructions for 
   details on the required tools, and required versions.