Online PHP editor | refs for JaFrM

@ 2013-02-11T22:30:10Z

<?php
interface Foo {
    public function thing(&$foo);
}
class Bar implements Foo {
    public function thing($foo) {
        $foo++;
    }
}
$bar = new Bar();
$a = 1;
$bar->thing($a);
var_dump($a);