<?php
class Bear
{
private $age = 0;
public function setAge($age)
{
if ($age < 0) {
throw new Exception('Bear cannot have negative age dumbass');
}
$this->age = $age;
}
}
$bear1 = new Bear();
$bear1->setAge(25);
$bear2 = new Bear();
$bear2->setAge(35);
var_dump($bear1);
var_dump($bear2);