Re: Re: is_a() against instanceof

Jason Barnett wrote:

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) { }

The only difference between && and AND is precedence, so the second statement won't be executed with either one.