specification:PHP规范模式的实现

规格 PHP 实现 用法 $ overDue = new OverDueSpecification (); $ noticeSent = new NoticeSentSpecification (); $ inCollection = new InCollectionSpecification (); // example of specification pattern logic chaining $ sendToCollection = $ overDue -> andX ( $ noticeSent ) -> not ( $ inCollection ); foreach ( $ service -> getInvoices () as $ currentInvoice ) { if (!