Is there an easy way to switch PHP versions while developing?
<p>I love <a href="https://rvm.io/" rel="nofollow">rvm</a> (ruby version manager), it allows to switch quickly between Ruby versions on the command line, like this:</p>

<pre><code>$ rvm use 1.9.3
</code></pre>

<p>Is there a similiar tool for PHP? (Preferably on the command line.) I'm currently developing a PHP framework, so I quickly need to test the code on different PHP version.</p>

<p>I'm using Ubuntu 11.10.</p>
