public function __call($method,$p)

[bertrc]

public function __call($method,$p){
    if($method =="display"){
        if(is_object($p[0])){
            $this->displayObject($p[0]);
        } else if (is_array($p[0])){
            $this->displayArray($p[0]);
        } else {
            $this->displayScalar($p[0]);
        }
    }
}

class overload {

}
$ov = new overload;
$ov->display(array(1,2,3));
$ov->display('cat');

I don't know how to pass the parameters to the function and the class is empty I am beginner with php I try to learn oop

[sneakyimp]

Have you tried reading the documentation?

[NogDog]

The function needs to be inside the class (turning it into a class "method").

[bertrc]

class overload {
 function __call($method,$p){
    if($method =="display"){
        if(is_object($p[0])){
            $this->displayObject($p[0]);
        } else if (is_array($p[0])){
            $this->displayArray($p[0]);
        } else {
            $this->displayScalar($p[0]);
        }
    }
}
}
$ov = new overload;
$ov->display(array(1,2,3));
$ov->display('cat');

it doesn't return any code;

[NogDog]

bertrc it doesn't return any code;

Each of those display*() methods (functions) needs to be defined in the class, too.

[Weedpacket]

There's nothing there that produces any output.