<?php

class BaseWithPropA {
  private $hello = 0;
}

trait AHelloProperty {
  private $hello = 0;
}

class BaseWithTPropB {
    use AHelloProperty;
}

class SubclassA extends BaseWithPropA {
    use AHelloProperty;
}

class SubclassB extends BaseWithTPropB {
    use AHelloProperty;
}

$a = new SubclassA;
var_dump($a);

$b = new SubclassB;
var_dump($b);

?>