Online PHP editor | refs for ln7Or

<?php #[AllowDynamicProperties] class A { public function setFoo($value) { $this->foo = $value; } public function unsetFoo() { unset($this->foo); } public function dump() { var_dump($this); try { var_dump($this->foo); } catch ( Error $err ) { echo 'ERROR: ', $err->getMessage(), "\n"; } } } $a = new A; echo "Initial:\n"; $a->dump(); echo "\nAssign null:\n"; $a->setFoo(null); $a->dump(); echo "\nUnset:\n"; $a->unsetFoo(); $a->dump(); echo "\nAssign value:\n"; $a->setFoo(42); $a->dump();