<?php
trait Drive {
    public $carName = 'BMW';
    public function driving() {
        echo "driving {$this->carName}\n";
    }
}
class Person {
    public function age() {
        echo "i am 18 years old\n";
    }
}
class Student extends Person {
    use Drive;
    public function study() {
        echo "Learn to drive \n";
    }
}
$student = new Student();
$student->study();
$student->age();
$student->driving();

Learn to drive 
i am 18 years old
driving BMW