<form method="POST">
    <h3>Editing: MatchingOnce.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php
namespace Hamcrest\Arrays;

/*
 Copyright (c) 2009 hamcrest.org
 */

use Hamcrest\Description;

class MatchingOnce
{

    private $_elementMatchers;
    private $_mismatchDescription;

    public function __construct(array $elementMatchers, Description $mismatchDescription)
    {
        $this-&gt;_elementMatchers = $elementMatchers;
        $this-&gt;_mismatchDescription = $mismatchDescription;
    }

    public function matches($item)
    {
        return $this-&gt;_isNotSurplus($item) &amp;&amp; $this-&gt;_isMatched($item);
    }

    public function isFinished($items)
    {
        if (empty($this-&gt;_elementMatchers)) {
            return true;
        }

        $this-&gt;_mismatchDescription
                 -&gt;appendText('No item matches: ')-&gt;appendList('', ', ', '', $this-&gt;_elementMatchers)
                 -&gt;appendText(' in ')-&gt;appendValueList('[', ', ', ']', $items)
                 ;

        return false;
    }

    // -- Private Methods

    private function _isNotSurplus($item)
    {
        if (empty($this-&gt;_elementMatchers)) {
            $this-&gt;_mismatchDescription-&gt;appendText('Not matched: ')-&gt;appendValue($item);

            return false;
        }

        return true;
    }

    private function _isMatched($item)
    {
            /** @var $matcher \Hamcrest\Matcher */
        foreach ($this-&gt;_elementMatchers as $i =&gt; $matcher) {
            if ($matcher-&gt;matches($item)) {
                unset($this-&gt;_elementMatchers[$i]);

                return true;
            }
        }

        $this-&gt;_mismatchDescription-&gt;appendText('Not matched: ')-&gt;appendValue($item);

        return false;
    }
}
</textarea><br>
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</form>