Proxy\Html::find PHP Method

    private static function find($selector, $html, $start_from = 0)
    {
        $html = substr($html, $start_from);
        $inner_start = 0;
        $inner_end = 0;
        $pattern = '//';
        if (substr($selector, 0, 1) == '#') {
            $pattern = '/<(\\w+)[^>]+id="' . substr($selector, 1) . '"[^>]*>/is';
        } else {
            if (substr($selector, 0, 1) == '.') {
                $pattern = '/<(\\w+)[^>]+class="' . substr($selector, 1) . '"[^>]*>/is';
            } else {
                return false;
            }
        }
        if (preg_match($pattern, $html, $matches, PREG_OFFSET_CAPTURE)) {
            $outer_start = $matches[0][1];
            $inner_start = $matches[0][1] + strlen($matches[0][0]);
            // tag stuff
            $tag_name = $matches[1][0];
            $tag_len = strlen($tag_name);
            $run_count = 300;
            // "open" <tag elements we found so far
            $open_count = 1;
            $start = $inner_start;
            while ($open_count != 0 && $run_count-- > 0) {
                $open_tag = strpos($html, "<{$tag_name}", $start);
                $close_tag = strpos($html, "</{$tag_name}", $start);
                // nothing was found?
                if ($open_tag === false && $close_tag === false) {
                    break;
                }
                //echo "open_tag: {$open_tag}, close_tag {$close_tag}\r\n";
                // found OPEN tag
                if ($close_tag === false || $open_tag !== false && $open_tag < $close_tag) {
                    $open_count++;
                    $start = $open_tag + $tag_len + 1;
                    //echo "found open tag: ".substr($html, $open_tag, 20)." at {$open_tag} \r\n";
                    // found CLOSE tag
                } else {
                    if ($open_tag === false || $close_tag !== false && $close_tag < $open_tag) {
                        $open_count--;
                        $start = $close_tag + $tag_len + 2;
                        //echo "found close tag: ".substr($html, $close_tag, 20)." at {$close_tag} \r\n";
                    }
                }
            }
            // something went wrong... don't bother returning anything
            if ($open_count != 0) {
                return false;
            }
            $outer_end = $close_tag + $tag_len + 3;
            $inner_end = $close_tag;
            return array('outer_start' => $outer_start + $start_from, 'inner_start' => $inner_start + $start_from, 'inner_end' => $inner_end + $start_from, 'outer_end' => $outer_end + $start_from);
        }
        return false;
    }