gistfile1.php

<?php

use Composer\Package\Version\VersionParser;

require 'vendor/autoload.php';

$parser = new VersionParser();

$constraint = $parser->parseConstraints('2013.09.*');
$single = $parser->parseConstraints('v2013.09.0');
var_dump($constraint);
var_dump($single);
var_dump($constraint->matches($single));