Online PHP editor | output for gJjbL

<?php interface BarInterface { /** * Bazzes the current environment. */ public function baz(); } class Foo { /** * @var \BarInterface */ protected $bar; /** * Constructs a new instance. * * @param \BarInterface $bar */ public function __construct(BarInterface $bar) { $this->bar = $bar; } /** * Bazzes the bar. */ public function baz() { $this->bar->baz(); } } class NullBar implements BarInterface { /** * {@inheritdoc} */ public function baz() { // Silently fail. } } class ShoutBar implements BarInterface { /** * {@inheritdoc} */ public function baz() { print "HELLO BAZ!"; } } $null_bar = new NullBar(); $shout_bar = new ShoutBar(); $null_bar_foo = new Foo($null_bar); $null_bar_foo->baz(); $shout_bar_foo = new Foo($shout_bar); $shout_bar_foo->baz();