Traits enables a developer to reuse sets of methods freely in several independent classes living in different class hierarchies. PHP being a single inheritance language, traits enables horizontal composition of behavior – the application of class members without requiring inheritance. I’ll cover Traits in a separate post itself.
Below is a artificial example from the PHP documentation.
<?php
trait Hello
{
public function sayHello()
{
echo 'Hello ';
}
}
trait World
{
public function sayWorld()
{
echo 'World';
}
}
class MyHelloWorld
{
use Hello, World;
public function sayExclamationMark()
{
echo '!';
}
}
$o = new MyHelloWorld();
$o->sayHello();
$o->sayWorld();
$o->sayExclamationMark();
?>
Which will output:
Hello World!
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