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<?php class foo { public function __isset($foo) { return $foo[0] == 'b'; } public function __get($foo) { return $foo == 'bar'; } } $f = new foo; var_dump(empty($f->a)); var_dump(empty($f->b)); var_dump(empty($f->bar));
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) bool(true) bool(false)

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