oops concepts using PHP

<?php
class Animal
{
    private $family;
    private $food;
    public function __construct($family, $food)
    {
        $this->family= $family;
        $this->food= $food;
        
    }
    public function get_family()
    {
        return $this->family;
    }
    public function set_family($family)
    {
        $this->family= $family;
    }
    public function get_food()
    {
        return $this->food;
    }
    public function set_food($food)
    {
        $this->food=$food;
    }
    
}