Language: C C++ D Haskell Lua OCaml PHP Perl Plain Text Python Ruby Scheme Tcl <?php /* sample code of implementation of Member overloading with help of magic functions * __set(), __get(), __isset(), __unset() * author : http://royads.blogspot.com */ class test { protected $defiened; protected $data = array(); public function __set($name,$value) { echo "\nset data in array"; $this->data[$name] = $value; } public function __get($name) { echo "\nget from array"; if(array_key_exists($name,$this->data)) return $this->data[$name]; else return NULL; } public function __isset($name) { echo "\nchking if set"; return isset($this->data[$name]); } public function __unset($name) { echo "\nunseting"; unset($this->data[$name]); } } $obj = new test(); echo $obj->notdefiened; $obj->notdefiened = 'r u there??'; echo $obj->notdefiened; if(isset($obj->notdefiened)) { unset($obj->notdefiened); } echo $obj->notdefiened; ?> Private [?] Run code