Re: is_a() against instanceof

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Christian Stadler wrote:
> Eli schrieb:
>
>>>- ($cls instanceof ClassName)  *requires* from ClassName to be declared,
>>>and generates a fatal error when ClassName is not declared.
>
> How about
> if (class_exists('ClassName') AND $cls instanceof ClassName)
> {
>    ...
> }
>
> Regards,
>   Christian Stadler

Nice suggestion!  But I wonder... would it perhaps be better to use the
&& operator instead of the AND operator?  That way in case you are
trying to do an assignment PHP won't bother to check instanceof if the
class_exists() fails.

if (class_exists($class) && $cls instanceof $class)
{

}


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