This documentation contains information about bot PHP 4 and PHP 5, with
some added migration and compatibility notes regarding PHP 3. Behaviour,
parameter, return value and other changes between different PHP
versions are documented in notes and inline text in the manual.
You may find documentation pieces for the CVS version of PHP, which
always means the very latest development version available through
the CVS version handling system. If you are not a developer of PHP
itself, and you are not keen on using the very latest development
version of PHP, features marked with the "available in CVS" wording
are not accessible to you. These features, though, will probably be
available in the next stable version of PHP. If you would like to
download the CVS version, see the anonymous
CVS access page.
You may also encounter documentation for a PHP version which is
not released (something like PHP 5.0.0 while the latest stable version
is 4.3.x). Most of the time, this is not an error in the documentation.
Explanation is often added for features not available in the current
PHP release, but which will be available in a known future PHP version.
