Is there a tool to manage multiple installations of PHP on one machine (e.g. to support different versions)?
<p><a href="http://perlbrew.pl/">perlbrew</a> is a tool to manage multiple installations of Perl on your system, making it easy to, say, quickly run a suite of test scripts against many different versions of Perl. </p>

<p>Is there anything like that for PHP? For now when I want to change the version of PHP that my system uses, I'll go into the build directory for my desired version and run <code>make install</code>.</p>
