how to get used traits in php-class?

php oop traits
Teson picture Teson · Nov 29, 2012 · Viewed 9.9k times · Source

Is there any function in PHP (5.4) to get used traits as array or similar:

class myClass extends movingThings {
  use bikes, tanks;

  __construct() {
    echo 'I\'m using the two traits:' . ????; // bikes, tanks
  }
}

Answer

Maurice picture Maurice · Mar 7, 2014

To easily get the used traits you can call class_uses()

$usedTraits = class_uses(MyClass);
// or
$usedTraits = class_uses($myObject);

General recommendations

When checking for available functionality, I would generally recommend to use interfaces. To add default functionality to an interface you would use traits. This way you can also benefit from type hinting.

Force an object having functionality by implementing an interface and then use a trait to implement default code for that interface.

class MyClass 
    implements SomeInterface 
{
    use SomeTrait;
}

Then you can check the interface by;

$myObject = new MyClass();
if ($myObject instanceof SomeInterface) {
    //...
}

And still use type hinting;

function someFunction( SomeInterface $object )
{ 
    //...
}

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