Piwik\Tracker\GoalManager::isGoalPatternMatchingUrl PHP Method

    protected function isGoalPatternMatchingUrl($goal, $pattern_type, $url)
    {
        switch ($pattern_type) {
            case 'regex':
                $pattern = $goal['pattern'];
                if (strpos($pattern, '/') !== false && strpos($pattern, '\\/') === false) {
                    $pattern = str_replace('/', '\\/', $pattern);
                }
                $pattern = '/' . $pattern . '/';
                if (!$goal['case_sensitive']) {
                    $pattern .= 'i';
                }
                $match = @preg_match($pattern, $url) == 1;
                break;
            case 'contains':
                if ($goal['case_sensitive']) {
                    $matched = strpos($url, $goal['pattern']);
                } else {
                    $matched = stripos($url, $goal['pattern']);
                }
                $match = $matched !== false;
                break;
            case 'exact':
                if ($goal['case_sensitive']) {
                    $matched = strcmp($goal['pattern'], $url);
                } else {
                    $matched = strcasecmp($goal['pattern'], $url);
                }
                $match = $matched == 0;
                break;
            default:
                throw new Exception(Piwik::translate('General_ExceptionInvalidGoalPattern', array($pattern_type)));
                break;
        }
        return $match;
    }