Building RESTful Web Services with PHP 7

Closure::call()

Binding an object scope with a closure is an efficient way to use a closure with different objects. At the same time, it is also a simple way to use different closures having different behaviors for an object in different places. This is because it binds the object scope with a closure at runtime without inheritance, composition, and so on. However, previously we didn't have the Closure::call() method; we had something like this:

<?php// Pre PHP 7 codeclass Point{    private $x = 1;     private $y = 2;}$getXFn = function() {return $this->x;};$getX = $getXFn->bindTo(new Point, 'Point');//intermediate closureecho $getX(); // will output 1

But now with Closure::call(), the same code can be written as follows:

<?php//  PHP 7+ codeclass ...