browser.php
public function clickLink($label, $index = 0)
    {
        $url = $this->getLink($label, $index);
        if ($url === false) {
            return false;
        }

        $this->load($url, new SimpleGetEncoding());

        return (bool) $this->getContent();
    }
public function clickLink($label, $index = 0)
    {
        $url = $this->getLink($label, $index);
        if ($url === false) {
            return false;
        }

        $this->load($url, new SimpleGetEncoding());

        return (bool) $this->getContent();
    }
Follows a link by label.
Will click the first link found with this link text by default,
or a later one, if an index is given.
The match ignores case and white space issues.

@param string $label     Text between the anchor tags.
@param int $index    Link position counting from zero.

@return boolean   True on success.