How do I make a nested class in PHP?

I'm new to PHP development and I am completely lost about how PHP handles classes and inheritance. As I read before, there are no nested classes in PHP. I am coming from C # and I would like to reproduce the following structure:

private class GameScore {
        public TeamData[] teams =  new TeamData[2];                      
        public Boolean alert { get; set; }
        public String date { get; set; }
        public String time { get; set; }
        public class TeamData {                
            public String name { get; set; }
            public String score { get; set; }
        }
    }

      

        
        
        
      

    

Each GameScore must have the name of the teams that played the match and the score they received in that match. I would like to store this data in the following way to list a few dozen matches:

GameScore[] game = new GameScore[n];

game[0].alert = true;
game[0].date = "Oct. 17";
game[0].time = "15:25 EST";
game[0].teams[0].name = "Toronto Raptors";
game[0].teams[0].score = "0";
game[0].teams[1].name = "New York Knicks";
game[0].teams[1].score = "0";

...

      

        
        
        
      

    

EDIT: I've tried the following structure:

class TeamData{
    public $name;
    public $score;

    public function __construct() {
        $this->name = '';
        $this->score = '';
    }
}

class GameScore{
    public $alert;
    public $date;
    public $time;

    public $team1;
    public $team2;

    function __construct(){
        $this->alert = false;
        $this->date = '';
        $this->time = '';
        $this->team1 = new TeamData();
        $this->team2 = new TeamData();
    }
}

      

        
        
        
      

    

While this replicates the same structure written in C #, it does not create any dependency between GameScore

and TeamData

(for example, I need to instantiate GameScore.TeamData

if I want to access this data type in C #, which is not the case for PHP since using the above code)

What's the correct way to achieve this?