OOP PHP example to practice inheritence, constructors

OOP_movies_inherit_practice.php

<!-- Psudeo Code:
1. Media content class with properties title, release date and a method
	to display info about the title and release date
2. Movies should contain genre and display additionally
3. Tv shows should contain num of seasons and display additionally 
-->

<?php
class Media_Content {

	public $title;
	public $release_date;

	public function __construct( $title, $release_date ) {
		$this->title        = $title;
		$this->release_date = $release_date;
	}
	
	public function show_info() {
		echo "The title is {$this->title} , the release date is {$this->release_date}<br><br>";
	}
}

class Movies extends Media_Content {

	public $genre;

	public function __construct(  $title, $release_date,$genre) {
		parent::__construct( $title, $release_date );
		$this->genre = $genre;

	}

	public function show_info() {
		parent::show_info();
		echo "and the genre is{$this->genre}<br><br>";
	}
}

class Tv_Shows extends Movies {

	public $num_of_seasons;

	public function __construct( $title, $release_date, $genre, $num_of_seasons ) {
		parent::__construct( $genre, $title, $release_date );
		$this->num_of_seasons = $num_of_seasons;
	}
	
	public function show_info() {
		parent::show_info();
		echo "and the season is {$this->num_of_seasons}.<br><br>"; 
	}
}

$media_content = new Media_Content( 'PSL9', '9/9/23' );
echo '<h2>Media Content</h2>';
$media_content->show_info();
echo '<hr />';

$movies = new Movies( 'Horror', 'The killer', '3/Sep/23' );
echo '<h2>Movies</h2>';
$movies->show_info();
echo '<hr />';

$tv_shows = new Tv_Shows( 'Homeland,', '6/4/23', 'Serial ', '4' );
echo '<h2>TV shows</h2>';
$tv_shows->show_info();
echo '<hr />';