ex_html.php

/**
 * Extended HtmlHelper
 * @author kanonji
 */
class ExHtmlHelper extends HtmlHelper {
    /**
     * Extended HtmlHelper->link() to understand the url is current or not.
     *
     * $options['current'] is additional option key.
     * If no value set, 'current' is set as default.
     * example:
     * $this->ExHtml->link('foo', 'bar', array('class'=>'baz', 'current'=>'qux'))
     * result:
     * <a href="/foo/" class="baz qux">bar</a>
     *
     * @param string $title The content to be wrapped by <a> tags.
     * @param mixed $url Cake-relative URL or array of URL parameters, or external URL (starts with http://)
     * @param array $options Array of HTML attributes.
     * @param string $confirmMessage JavaScript confirmation message.
     * @return string An `<a />` element.
     * @access public
     * @link http://book.cakephp.org/view/1442/link
     */
    public function link($title, $url = null, $options = array(), $confirmMessage = false) {
        $current = 'current';
        if(isset($options['current']))
            $current = $options['current'];
        unset($options['current']);
        if ($url === null)
            $str = Router::url($title);
        else
            $str = Router::url($url);
        list($str) = explode('?', $str);
        if(rtrim($str, '/') === rtrim(Router::url(""), '/'))
            $options['class'] = isset($options['class']) ? "{$options['class']} {$current}" : $current;
        return parent::link($title, $url, $options, $confirmMessage);
    }
}