Chain of responsibility pattern

In this example, chain of responsibility pattern is implemented with php.

composer install

Example

$productRuleService = new \src\Business\RuleService\ProductRuleService();

$product = new \src\Object\ProductObject(5);

$productRuleService->validate($product);

$validation = $productRuleService->getValidation();

echo $validation; 

#Output 
#You can buy this product!