Template Design Pattern

index.php

<?php


abstract class Gratitude {


    protected $reporter;

    protected $date;

    public function __construct($reporter, $date)
    {
        $this->reporter = $reporter;
        $this->date = $date;
    }

    final public function display()
    {
        echo 'REPORTER ' . $this->reporter . PHP_EOL;
        echo 'MESSAGE ' . $this->customMessage();
        echo 'DATE ' . $this->date . PHP_EOL;
    }

    public abstract function customMessage(): string;

}

class KindDeed extends Gratitude {

    protected $deed;

    public function __construct($reporter, $date, $deed)
    {
        parent::__construct($reporter, $date);
        $this->reporter = $reporter;
    }

    public function customMessage(): string
    {
        return 'Good Deed ' . $this->deed . PHP_EOL;
    }
}

class GreatNight extends Gratitude {

    /**
     * @var string
     */
    protected $event;

    public function __construct($reporter, $date, $event)
    {
        parent::__construct($reporter, $date);
        $this->event = $event;
    }

    public function customMessage(): string
    {
        return ' Great night doing ' . $this->event . PHP_EOL;
    }
}

(new GreatNight('Bill', '03/01/2019', 'Won bowling game'))->display();
(new KindDeed('Bill', '03/01/2019', 'Help some across street'))->display();