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<?php class Foo { } $a = new Foo(); $z = array(); var_dump(isset($a->b->c)); //var_dump(isset($a->b->c['d'])); var_dump(isset($z['y']['x'])); var_dump(isset($a->b['c']->d)); var_dump(isset($a->b['c']['d'])); var_dump(isset($z['y']->x));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(false) bool(false) bool(false) bool(false) bool(false)