PHP self, this VS JS self, this

 PHP 

self, this :

Use $this to refer to the current object. Use self to refer to the current class. In other words, use $this->member for non-static members, use self::$member for static members.

https://stackoverflow.com/questions/151969/when-to-use-self-over-this

JS :

self, this :

var functionX = function() {
  var self = this;
  var functionY = function(y) {
    // If we call "this" in here, we get a reference to functionY,
    // but if we call "self" (defined earlier), we get a reference to function X.
  }
}

JS - class can be created through function I.E var A = function () {

}; var b = new A();

https://stackoverflow.com/questions/337878/var-self-this