PHP Call different library at different place of an Application
<p>In my application at some point, I have to call the Propel library version 1.2 ( which is located at directoryA), and at another point, I need to call the Propel library version 1.3 ( which is located at directoryB).</p>

<p>How to do this?</p>

<p><strong>Edit: I need this because a component I use uses an older version of a library that I use as well.</strong></p>
