Basis for a good developer

<?php

class SayNothing
{
    public function howToAct()
    {
        return 'If you can\t say anything nice, then don\'t say anything at all';
    }
}

class GoldenRule extends SayNothing
{
    public function howToAct()
    {
        return 'Treat others how you want to be treated';
    }
}

class Respect extends GoldenRule
{
    public function howToAct()
    {
        return 'Be respectful';
    }
}

class HumanBeing extends Respect() {}

$developer = new HumanBeing();