class lanjie
{
function __get($name)
{
echo $name." property not found! ";
}
}

$ob = new lanjie();
echo $ob->g;

class person
{
private $_age;
private $_name;
function __set($name, $value)
{
$method = "set". ucfirst($name);
echo $method;
if(method_exists($this, $method) )
{
return $this->$method( $value );
}
}

function setName( $name )
{
$this->_name = $name;
if( !is_null($this->_name) )
{
$this->_name = strtoupper($this->_name);
}
}
function setAge( $age )
{
return $this->_age = (int)$age;
}
}

$p = new person();
$p->name = 'bob';
print_r( array( $p ) );