Adding Object ID to objects using php5.4 traits

object_id_php_traits.php

<?php
trait ObjectId
{
    public function getObjectId()
    {
        if(!isset($this->__objectId__)) {
            $this->__objectId__ = uniqid();
        }
        
        return $this->__objectId__;
    }
}

class Foo
{
    use ObjectId;
}

$a = new Foo();
$b = new Foo();
echo "a " . $a->getObjectId() . "\n";
echo "b " . $b->getObjectId() . "\n";