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    <h3>Editing: IsEqualIgnoringWhiteSpace.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php
namespace Hamcrest\Text;

/*
 Copyright (c) 2009 hamcrest.org
 */
use Hamcrest\Description;
use Hamcrest\TypeSafeMatcher;

/**
 * Tests if a string is equal to another string, ignoring any changes in
 * whitespace.
 */
class IsEqualIgnoringWhiteSpace extends TypeSafeMatcher
{

    private $_string;

    public function __construct($string)
    {
        parent::__construct(self::TYPE_STRING);

        $this-&gt;_string = $string;
    }

    protected function matchesSafely($item)
    {
        return (strtolower($this-&gt;_stripSpace($item))
                === strtolower($this-&gt;_stripSpace($this-&gt;_string)));
    }

    protected function describeMismatchSafely($item, Description $mismatchDescription)
    {
        $mismatchDescription-&gt;appendText('was ')-&gt;appendText($item);
    }

    public function describeTo(Description $description)
    {
        $description-&gt;appendText('equalToIgnoringWhiteSpace(')
                                -&gt;appendValue($this-&gt;_string)
                                -&gt;appendText(')')
                                ;
    }

    /**
     * Matches if value is a string equal to $string, regardless of whitespace.
     *
     * @factory
     */
    public static function equalToIgnoringWhiteSpace($string)
    {
        return new self($string);
    }

    // -- Private Methods

    private function _stripSpace($string)
    {
        $parts = preg_split(&quot;/[\r\n\t ]+/&quot;, $string);
        foreach ($parts as $i =&gt; $part) {
            $parts[$i] = trim($part, &quot; \r\n\t&quot;);
        }

        return trim(implode(' ', $parts), &quot; \r\n\t&quot;);
    }
}
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