Question about a subclass object calling directly the overloaded function within the base class

Ask the subclass object to call directly the overloaded function within the base class?
The question looks like the following code
Class A
{
function A ()
{
$this->nnum = 1024;
}
function Selfclass ()
{
echo "Class A
";
}
}

Class B extends A
{
function Selfclass ()
{
echo "Class B
";
}
}
?>

$obj = new B ();
$obj->selfclass (); Call the function Selfclass () function of Class B
/* How can I use the Selfclass () function of the base class of object obj?
C + + can write similar code $obj->a::selfclass (), then how can PHP be implemented? */
?>

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------Solution--------------------
Reference: What

about parameter passing?

It's not that troublesome.
Class A
{
function A ()
{
$this->nnum = 1024;
}
function Selfclass ($a, $b, $c, $d, $e, $f)
{

echo "Class A
" . $this->nnum. "
" . " $a, $b, $c, $d, $e, $f ". "
";
}

function __call ($name, $arguments) {
List ($class _name, $function _name) = Explode (' _ ', $name);

if (is_subclass_of ($this, $class _name))
{
Reflect a method
$reflectionMethod = new Reflectionmethod ($class _name, $function _name);

Called with the current object
$reflectionMethod->invokeargs ($this, $arguments);
}


}
}

Class B extends A
{
function B ()
{
$this->nnum = 2048;
}
function Selfclass ()
{
echo "Class B
" . $this->nnum. "
";
}
}

Class C extends B
{
function C ()
{
$this->nnum = 4096;
}
function Selfclass ()
{
echo "Class C
" . $this->nnum. "
";
}
}

$obj = new B ();
$obj->selfclass (); Call the function Selfclass () function of Class B

$obj->a_selfclass (1,2,3,4,5,6,7);

$obj = new C ();
$obj->selfclass (); Call the function Selfclass () function of Class C

$obj->a_selfclass (1,2,3,4,5,6,7);
$obj->b_selfclass ();

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