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<?php class Foo { public $bar; public $baz; public $taz; } // please note that this API has a signature of `object $object` - any object allowed. function unsetProperties($object) { // we ignore inheritance and private properties for simplicity return array_diff( array_map( function (\ReflectionProperty $p) : string { return $p->getName(); }, (new ReflectionClass($object))->getProperties() ), array_keys((array) $object) ); } var_dump(unsetProperties(new Foo)); $foo = new Foo; unset($foo->baz); var_dump(unsetProperties($foo));
Output for git.master, git.master_jit, rfc.property-hooks
array(0) { } array(1) { [1]=> string(3) "baz" }

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