* Allow to set a default value for call-by-reference-parameters.
eg: function hello (&$pallo = NULL) {}
* Disallow function(method) redefinition in class.
- * Add configure test to determine if dlsym() requires underscore and set
- DLSYM_NEEDS_UNDERSCORE accordingly. Perl and zsh have it in configure,
- for example. (DONE?)
For PHP 5.0.0:
* Native large number support (probably with GNU GMP)