Hola:
agradecería me puediesen dar una explicación acerca de que significa este warning y por que se produce.
Warning: Unknown(): Your script possibly relies on a session side-effect which existed until PHP 4.2.3. Please be advised that the session extension does not consider global variables as a source of data, unless register_globals is enabled. You can disable this functionality and this warning by setting session.bug_compat_42 or session.bug_compat_warn to off, respectively.
Trabajo con php:
Sistema operativo: Windows Xp
Servidor Web: Apache 1.3.24
Version PHP: 4.3.2
Register Globals= Off