How to get all use statements declared in PHP class file

Lets say I have a fallowing class:

<?php
namespace \ImTheVendor\Project5;

use \ImTheVendor\Project1\SomeClass,
    \ImTheVendor\Project2\SomeOtherClass;
use \ImTheVendor\Project5\SomeClass;

class Something
{

}

How can I get all namespaces declared with use statement? Do I have to regexp the file itself or is there an easier way to do it?

~Thanks