#43926 [Opn]: isInstance() isn't equivalent to instanceof operator

ID: 43926 Updated by: felipe@php.net Reported By: felipe@php.net Status: Open Bug Type: Unknown/Other Function Operating System: Linux PHP Version: 5.3CVS-2008-01-24 (CVS) New Comment: .phpt: http://ecl.zoone.com.br/etc/patches/bug43926.phpt Patch: http://ecl.zoone.com.br/etc/patches/bug43926.patch Previous Comments: ------------------------------------------------------------------------ [2008-01-24 13:16:07] felipe@php.net Description: ------------ Says the documentation: "Note: $class = new ReflectionClass('Foo'); $class->isInstance($arg) is equivalent to $arg instanceof Foo or is_a($arg, 'Foo')." However, this isn't true because not is checked the parent class. Reproduce code: --------------- <?php class E { } class D extends E { } class A extends D { } class C extends A { } $ra = new ReflectionClass('A'); $rc = new ReflectionClass('C'); $rd = new ReflectionClass('D'); $re = new ReflectionClass('E'); $ca = $ra->newInstance(); $cc = $rc->newInstance(); $cd = $rd->newInstance(); $ce = $re->newInstance(); print("Is? A ". ($ra->isInstance($ca) ? 'true' : 'false') .", instanceof: ". (($ca instanceof A) ? 'true' : 'false') ."\n"); print("Is? C ". ($ra->isInstance($cc) ? 'true' : 'false') .", instanceof: ". (($ca instanceof C) ? 'true' : 'false') ."\n"); print("Is? D ". ($ra->isInstance($cd) ? 'true' : 'false') .", instanceof: ". (($ca instanceof D) ? 'true' : 'false') ."\n"); print("Is? E ". ($ra->isInstance($ce) ? 'true' : 'false') .", instanceof: ". (($ca instanceof E) ? 'true' : 'false') ."\n"); ?> Expected result: ---------------- Is? A true, instanceof: true Is? C false, instanceof: false Is? D true, instanceof: true Is? E true, instanceof: true Actual result: -------------- Is? A true, instanceof: true Is? C false, instanceof: false Is? D false, instanceof: true Is? E false, instanceof: true ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=43926&edit=1