Online PHP editor | refs for kBBBd

<?php class test { public function a(){ $this->isEmpty = 1; var_dump(property_exists($this, 'isEmpty')); unset($this->isEmpty); var_dump(property_exists($this, 'isEmpty')); } } $t = new test(); $t->a(); class test2 { public $isEmpty; public function a(){ $this->isEmpty = 1; var_dump(property_exists($this, 'isEmpty')); unset($this->isEmpty); var_dump(property_exists($this, 'isEmpty')); } } $t = new test2(); $t->a(); class test3 { public $isEmpty; public function a(){ $this->isEmpty = 1; var_dump(isset($this->isEmpty)); unset($this->isEmpty); var_dump(isset($this->isEmpty)); } } $t = new test3(); $t->a();