Exemplo Traits

5.4.php

<?php

trait SomeClass {
    public function add($x, $y) { return $x + $y; }
}

class TestComponent {
    use SomeClass;
}

$test_comp = new TestComponent(); 
$test_comp->add(2, 5);

yii.php

<?php

class SomeClass extends CBehavior
{
    public function add($x, $y) { return $x + $y; }
}


$test_comp = new TestComponent(); 
$test_comp->attachbehavior('blah', new SomeClass);
$test_comp->add(2, 5);