Functions, Classes, and Methods as well as Custom Superglobals works with all releases of PHP
5. No special requirements are necessary.
PHP 5.1.0 or later, or PHP 5.0.0 with a special TSRM patch applied.
Regardless of which version of PHP is in use it must be compiled
with the –enable-maintainer-zts option. See the
README file in the runkit package for additional