gistfile1.txt

<?php
trait MetaProperties {
	public $limit = 0;

    public function setLimit($limit) {
		$this->limit = $limit <= $this->maxCount ? $limit : $this->maxCount;
	}

	public function getLimit() {
		return $this->limit;
	}
}

class Categories {
	use MetaProperties;
	public $maxCount = 100;
}

class Orders {
    use MetaProperties;
    public $maxCount = 1000;
}

$a = new Categories;
$a->setLimit(100);
var_dump($a->getLimit());

$a = new Orders;
$a->setLimit(2000);
var_dump($a->getLimit());

let's call $maxCount, $maxLimit