How can traits be utilized in PHP to address the challenges of variable handling and function sharing between abstract and derived classes, and what are the trade-offs of this approach in terms of code maintainability and performance?

Traits can be used in PHP to share methods among classes without using inheritance. This allows for code reuse and flexibility in sharing functionality between abstract and derived classes. However, using traits can lead to code duplication and potential conflicts if not used carefully. 

trait Logging {
    public function log($message) {
        echo $message;
    }
}

abstract class AbstractClass {
    use Logging;

    abstract public function doSomething();
}

class DerivedClass extends AbstractClass {
    public function doSomething() {
        $this->log("Doing something...");
    }
}

$derived = new DerivedClass();
$derived->doSomething();

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