privateExampleCode.php

<?php

class Car {

    private $topSpeed;

    function __construct($topSpeed) {
        $this->topSpeed = $topSpeed;
    }

    public function drive() {
        return "Driving at " . $this->topSpeed . " vrooms<br>";
    }
}

$car1 = new Car(120);
echo $car1->drive();

// will raise an error if we try to access a private member
echo "Top speed for this car is " . $car1->topSpeed;

?>