<?php
class a {
public function vw($xc) {
return $xc;
}
}
class b extends a {
public function wv() {
echo parent::vw("I'm a missing parameter") . 'from b via wv';
}
}
$d = new a;
echo $d->vw('this is a').PHP_EOL;
$c = new b;
echo $c->vw('this is a from b via a').PHP_EOL;
$c->wv();