How can we tell if a class uses a Trait?
For example:
trait Setter
{
protected $vars = [];
public function __set($key, $value)
{
$this->vars[$key] = $value;
}
}
class User
{
use Setter;
}
$user = new User;
if ($user contém o trait Setter) {
// faça alguma coisa
}
According to the given code, how do you know that $user is using trait Setter ?
There is a function in PHP that is class_uses .
See the class_uses link
Another way to find out if trait exists in a class is through the RelectionClass::getTraits
See:
$reflection = new ReflectionClass('MyClass');
if (in_array($trait, $reflection->getTraits())) {
// Trait existe
}
Or:
$reflection = new ReflectionClass('MyClass');
if (isset($reflection->getTraits()[$trait])) {
// Trait existe
}