<?php
    class person {
        public $hair;
        public $eyes;
        public $gender;
    }
    
    $joe = new person();
    $joe->hair = 'brown';
    $joe->eyes = 'blue';
    $joe->gender = 'male';

    print_r($joe);
?>

person Object
(
    [hair] => brown
    [eyes] => blue
    [gender] => male
)