class Car { public static $numWheels = 4; public $make; public $model; } $car1 = new Car(); $car1->make = "Honda"; $car1->model = "Civic"; $car2 = new Car(); $car2->make = "Toyota"; $car2->model = "Camry"; echo Car::$numWheels; // Returns 4 echo $car1::$numWheels; // Returns 4 echo $car2::$numWheels; // Returns 4This example defines a static variable `$numWheels` in the `Car` class, which is set to `4`. The class also has instance variables `$make` and `$model`. The variables `$car1` and `$car2` are instances of the `Car` class, and have their own values for `$make` and `$model`. However, both instances share the value of `$numWheels`, which is accessed using the class name followed by `::`. The use of static items is common in PHP libraries such as Laravel, which has a number of helper classes with static methods for various purposes, such as string manipulation, file handling, and authentication.