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Jason Barnett schrieb:
> 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)
> {
>
> }
mmh ... instanceof isn't listed at
http://www.php.net/manual/en/language.operators.php#language.operators.precedence
so I'm not 100% sure. But neither
php -r "var_dump(class_exists('foobar') AND $a instanceof foobar);"
nor
php -r "var_dump(class_exists('foobar') AND ($a instanceof foobar));"
triggered an error on the commandline. So I guess, both && and AND
should work.
Regards,
Christian Stadler
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