Better Code Design in PHP

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Better Code Design in PHP PHP FWDAYS’24 @[email protected]

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I Stand With Ukraine Anna Filina • Coding since 1997. • PHP, Java, C#, etc. • Legacy archaeology. • Test automation. • Talks and workshops. • YouTube videos. • Filina Consulting.

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I Stand With Ukraine

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I Stand With Ukraine #100

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I Stand With Ukraine Object Back-and-forth Collaborator

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I Stand With Ukraine Object One-way reference Collaborator

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I Stand With Ukraine Object Chatty Collaborator Step 1 Step 2 Step 3

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I Stand With Ukraine Object Less chatty Collaborator Task Step 1 Step 2 Step 3

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I Stand With Ukraine Is the complexity justified? Object 1 Object 2 Object 3 Object 4 Bus

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I Stand With Ukraine Design Drive • Avoid complexity until I need it. • Do I understand what’s going on in terms of the business use case?

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I Stand With Ukraine

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I Stand With Ukraine Objects should speak business, not technical.

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I Stand With Ukraine $lineItems = $this->orders->getLineItems($pendingOrderNumber); $taxTotals = $this->taxes->calculateForLineItems($lineItems);

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I Stand With Ukraine Project • Marketplace for short-term rental: • Search properties for rent by city, date and number of guests. • Reserve & pay.

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I Stand With Ukraine ReservationService ->reserve() PaymentManager ReservationManager processPayment(data) Templating saveReservation(data) confirmReservation(data) html EmailManager payment savePayment(data) confirmReservation(html)

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I Stand With Ukraine MakeReservation ReservationRepository add(paidReservation) ReservationNotifier PaymentProcessor capture(charge) paymentConfirmation notifyBuyer(paidReservation)

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I Stand With Ukraine MakeReservation ReservationRepository add(paidReservation) ReservationNotifier PaymentProcessor capture(charge) paymentConfirmation notifyBuyer(paidReservation)

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I Stand With Ukraine MakeReservation ReservationRepository add(paidReservation) ReservationNotifier PaymentProcessor capture(charge) paymentConfirmation notifyBuyer(paidReservation)

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I Stand With Ukraine MakeReservation ReservationRepository add(paidReservation) notifyBuyer(paidReservation) ReservationNotifier PaymentProcessor capture(charge) paymentConfirmation

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I Stand With Ukraine MakeReservation ReservationRepository add(paidReservation) ReservationNotifier PaymentProcessor capture(charge) paymentConfirmation notifyBuyer(paidReservation)

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I Stand With Ukraine Good design needs no diagrams.

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I Stand With Ukraine

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I Stand With Ukraine Simple Code • No need for framework. • No need to design the database. • No need to have a UI. • Code the business rules.

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I Stand With Ukraine

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I Stand With Ukraine Handle HTTP Request Return HTTP Response 2 adults in Lviv on Jan 1 to Jan 7 Results containing “Lviv for 4”

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I Stand With Ukraine

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I Stand With Ukraine Handle HTTP Request Return HTTP Response 2 adults in Lviv on Jan 1 to Jan 7 Results containing “Lviv for 4”

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I Stand With Ukraine

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I Stand With Ukraine

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I Stand With Ukraine

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I Stand With Ukraine

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I Stand With Ukraine

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I Stand With Ukraine A complex system that works is invariably found to have evolved from a simple system that worked. — John Gall

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I Stand With Ukraine

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I Stand With Ukraine Too reusable becomes unusable.

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I Stand With Ukraine

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I Stand With Ukraine Input/output Business rules Infrastructure Use case

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I Stand With Ukraine

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I Stand With Ukraine

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I Stand With Ukraine

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I Stand With Ukraine

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I Stand With Ukraine

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I Stand With Ukraine

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I Stand With Ukraine

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I Stand With Ukraine

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I Stand With Ukraine

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I Stand With Ukraine PropertySearchHandler Lviv, Lviv Oblast, Ukraine Convert to coordinates. CitySearchHandler Lviv - Lviv, Lviv Oblast, Ukraine - Lviv Boulevard, Oshawa, ON

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I Stand With Ukraine

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I Stand With Ukraine PropertySearchHandler 49.8397, 24.0297 Longitude: -180 to +180 Latitude: -90 to +90 CitySearchHandler Lviv Lviv, Lviv Oblast, Ukraine 49.8397 24.0297

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I Stand With Ukraine

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I Stand With Ukraine Code is simply a model of the business rules and knowledge.

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@[email protected]