voku / HtmlMin

    $attrs = array();

    foreach ((array)$attributes as $attrName => $attrValue) {

      if (isset(self::$booleanAttributes[$attrName])) {

        if ($this->doSortHtmlAttributes === true) {

          $attrs[$attrName] = $this->booleanAttributesHelper;

          $element->{$attrName} = null;

        }

        continue;

      }

      // -------------------------------------------------------------------------

      // Remove optional "http:"-prefix from attributes.

        $attrValue = $this->sortCssClassNames($attrName, $attrValue);

      }

      if ($this->doSortHtmlAttributes === true) {

        $attrs[$attrName] = $attrValue;

        $element->{$attrName} = null;

      }

    }

    // -------------------------------------------------------------------------