You need to specify the class visibility mode or access specifier (private/protected/public). The default (one which is used when nothing is provided as in your case) specifier used is "private". Hence the function can't be used outside the class, even in inherited. You should use either protected (inherited class) or public (to access from anywhere).

Hi,
you can do like this.

class damu
{
public function one()
{
return $name = "damu";
}
}
//=======================
class dharan extends damu
{
function myname ()
{
return $myname = $this->one();
}

function myname2()
{

}
}

$objdharan = new dharan;
echo $objdharan->myname();