Reserved key associated with the name of the supported
scripting language
Reserved key associated with the version of the supported
scripting language
For PHP4's last_exception_get.
I have decided to override loadClass instead of findClass,
so that this method will actually get to re-load
classes if neccessary.
Display an error or an exception
The loglevel:
0: log off
1: log fatal
2: log messages/exceptions
3: log verbose
4: log debug
5: log method invocations