Re: Exceptions and Errors

On 12 Apr 2004 at 12:05, Andi Gutmans wrote: > I agree it's a problem, but as you know, for BC reasons we can't make all > internal functions throw exceptions. I do suggest however, that new object > oriented extensions throw exceptions in object context. This isn't a BC > break and makes sense as it's used in an object-oriented context. > In any case, I understand that throwing an exception from user- land error > handling works as expected so this can partially solve the problem with > internal functions too. > > Andi The problem with exception thrown by a user-land error handler is to distinguish real exceptions that break the execution from informative warnings. I have just experienced this while playing around with XML Schema validation and 5.0.0b4. The current implementation always triggers two warnings telling 'Unimplemented block at xmlschemas.c:2245'. Furthermore, every validation failure is reported using PHP warnings. That's why it is impossible to use a "user-land exception thrower" with schema validation at the moment. I don't know if it is the only extension misusing the errror handling mechanism... -- Ferdinand Beyer <fb@fbeyer.com>