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Animal.php
Animal.php
 
 
Dog.php
Dog.php
 
 
NullAnimal.php
NullAnimal.php
 
 
README.md
README.md
 
 
index.php
index.php
 
 

README.md

#Null Object А Null Object is an object with defined neutral ("null") behavior. The Null Object design pattern describes the uses of such objects and their behavior (or lack thereof). More…

function doSomething(Animal $animal)
{
    $animal->sound();
}

doSomething(new Dog); // woof
doSomething(new NullAnimal); //