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.


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