Dutch PHP Conference 2015 unconference entry. About how you should always be able to make an analogy to real life when doing object oriented programming. This is my first talk ever and was created between 2am and 5am in the night before this uncon. Thanks goes to @coderabbi for giving me the inspiration to do this unconf at PHP benelux 2015 and @rosstuck for the slide in his talk that gave me the idea on what to talk about. http://www.slideshare.net/rosstuck/command-bus-to-awesome-town (slide 56 was my inspiration ;) )

1. How cyborg puppies can
sniff out code smell
Niels van Esch
@goatcode
https://joind.in/14706

5. OOP 101

8. class Dog {
public function bark() {
echo “woof”;
}
}

9. class Chihuahua extends Dog {
public function bark() {
echo “kef-kef”;
}
}

10. class GermanShepherd extends Dog {
public function bark() {
echo “ACHTUNG!”;
}
}

11. Abstract class Dog {
public function bark() {
echo “woof”;
}
public function wagTail() {
echo “woosh!”;
}
}

12. class Tail {
public function wag() {
echo “woosh”;
}
}

13. class Dog {
private $tail;
...
public function wagTail() {
if($this->tail === null) {
$this->tail = new Tail();
}
$this->tail->wag();
}
}

15. Command pattern
$command->execute();

17. Command handler
$handler->handle($command);

18. Command bus
$commandBus->handle($command);

19. More real examples
using furniture to check
● Single responsibility principle
● Open/closed principle
● Liskov substitution principle
● Interface segregation principle
● Dependency inversion principle

21. Questions?
Niels van Esch
info@nvanesch.nl
@goatcode
https://joind.in/14706