On Wed, 2007-10-10 at 22:15 -0400, Nathan Nobbe wrote:
> well i have to say i dont really see the difference between an
> implicit and explicit interface.
> 
> the example you gave looks like it works just like the example i gave.
> 
> in your example the check for the function is performed at runtime. 
> in the example i gave the check for the interface is performed at
> runtime.

Interfaces are checked at parse time. I'm very sure you need to include
the interface description before you can implement it. That makes it
explicit. My example doesn't need any interface description, the
interface of "wiggle()" is implicit.

> the only difference is that in mine php does the check and in yours
> method_exists()
> does the check.

I only put that there for fun. I could have skipped the check entirely.
Then it would be expected that the wiggle() method existed. If the
method doesn't exist then at run time the script will stop-- fortunately
with a fatal error :)

Cheers,
Rob
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