<?php
class Foo{
    /...
    public static fonction getClassName(){
        return static::class;
    }
    /...
}
Foo::getClassName(); // return "Foo"
?>

class Foo{

    static get className(){ return "Foo";}

    // ...
    // ...

}

Foo.className(); // get the hardcoded "Foo"

class Foo{

    static get className(){ return someJavascriptAlreadyWayForGetClassName() ;}

    // ...
    // ...

}
Foo.classCame(); // get "Foo"

function Foo() {}

var fooInstance = new Foo();
console.log(fooInstance.constructor.name); // logs "Foo"