Javascript. Inheritance.

/************************** Parent ***************************/
// constructor
function Animal(name) {
 this.name = name;
  this.speed = 0;
}

// parent methods in prototype
Animal.prototype = {
 run: function (speed) {
   this.speed += speed;
    console.log(this.name + " runs with speed " + this.speed);
    return this;
  },
  stop: function () {
   this.speed = 0;
    console.log(this.name + " stopped");
    return this;
  }
}
/************************** Parent ***************************/
/************************** Child ****************************/
// constructor
function Rabbit(name) {
 Animal.apply(this, arguments); // apply parent's constructor
}

// inheritance
Rabbit.prototype = Object.create(Animal.prototype);
// http://stackoverflow.com/questions/8453887/why-is-it-necessary-to-set-the-prototype-constructor
Rabbit.prototype.constructor = Rabbit;

// methods of child
Rabbit.prototype.jump = function () {
 this.speed++;
  console.log(this.name + " jumps");
  return this;
};

// method overriding
Rabbit.prototype.run = function (speed) {
 Animal.prototype.run.apply(this, arguments);
  this.jump();
  return this;
};
/************************** Child ****************************/

var rabbit = new Rabbit("Jack").run(10).stop();

console.log(rabbit instanceof Animal);
console.log(rabbit instanceof Rabbit);

PHP. Handle file_get_contents errors as Exception.

Below is the way to handle "file_get_contents" errors as ErrorExceptions:

set_error_handler(
    function ($errno, $errstr, $errfile, $errline) {
        throw new \ErrorException(
            $errstr, 0, $errno, $errfile, $errline
        );
    }
);

$contents = file_get_contents(
    $uri, false, $context
);

restore_error_handler();