search application help

[eluser]skunkbad[/eluser]

Code:

class Search extends Controller {
    private $keyword = null;
    private $error = null;
    private $local = 0;
    private $min_chars = 3;
    private $max_chars = 30;
    private $boundary = '<!-- SEARCH BOUNDARY -->';
    private $message_A= "Your search results for:";
    private $message_B = "Invalid Search <span style='font-style:italic; font-size:80%;'>(too short or too long)</span>";
    private $message_C = "The value that you are searching for is either less than 3 characters, or more than 30 characters. Please try to search again with a search value between 3 and 30 characters in length.";
    private $message_D = "No Search Value";
    private $message_E = "The search program can't search for an empty value. Try typing something in to the search form before pressing the \"Search\" button.";
    private $message_F = "There were no instances of&nbsp;";
    private $message_G = "&nbsp;found on any of the pages of this site";
    private $no_title = "Untitled";
    private $limit_extracts = "10";
    private $contents;

    public function index()
    {
        $this->keyword = $this->input->post('keyword');
        $this->searchHeader();
        $this->searchFiles();

        // insert page specific data into template
        $data = array(
            'title' => 'Brian\'s Web Design - Search',
            'robots' => 'noindex,nofollow',
            'style_sheet_names' => array(
                                        'css/style.css',
                                        'css/page_specific/search/screen.css'
            ),
            'media_targets' => array(
                                    'screen',
                                    'screen'
            ),
            'javascripts' => array(
                                    'js/target_blank.js'
            ),
            'slogan' => 'Great Web Design - Quality You Can Trust',
            'content' => $this->load->view('search', array('search_results' => $this->contents) , TRUE)
        );
        $this->load->view('template_content', $data );
    }

    private function searchHeader() {
        $this->searchError();
        if ($this->error!=1&&isset;($this->keyword)){
            $this->contents = "<h2>$this->message_A <i>".htmlentities(stripslashes($this->keyword))."</i></h2>\n";
        }
    }

    private function searchError() {
        if (isset($this->keyword)){
            if(strlen($this->keyword)<$this->min_chars||strlen($this->keyword)>$this->max_chars) {
                $this->contents =  "<h2>$this->message_B</h2>";
                $this->contents .=  "<p>$this->message_C</p>";
                $this->error = 1;
            }
        }else{
            $this->contents =  "<h2>$this->message_D</h2>";
            $this->contents .=  "<p>$this->message_E</p>";
            $this->error = 1;
        }
    }

    private function searchFiles() {
        if (isset($this->keyword)&&$this->error!=1){
            $pageList = file(site_url('sitemap/txt', 'http'), FILE_IGNORE_NEW_LINES);
            foreach($pageList as $page){
                $fgcdata = file_get_contents($page);
                $chopped = explode($this->boundary,$fgcdata);
                static $count_hits = null;
                if (count($chopped) >= 3){
                    $text = null;
                    for($i=0;$i<=count($chopped)-1;$i++){
                        if ($i%2){
                            $text .= $chopped[$i];
                        }
                    }
                    $text = strip_tags($text);
                    $keyword_html = htmlentities($this->keyword);
                    $do=stristr($text, $this->keyword)||stristr($text, $keyword_html);
                    if($do)    {
                        $count_hits++;
                        if(preg_match_all("=&lt;title[^&gt;]*>(.*)&lt;/title&gt;=siU", $fgcdata, $title)) {
                            if(!$title[1][0])
                                $link_title=$no_title;
                            else
                                $link_title=$title[1][0];
                        }
                        else {
                            $link_title=$no_title;
                        }
                        ($page == $pageList[0]) ? $page = base_url() : $page = $page;
                        $this->contents .=  "<p class=\"itemP\">\n\t<a >$count_hits.  $link_title</a>\n\t<br />\n\t";
                        $this->keyword = preg_quote($this->keyword);
                        $this->keyword = str_replace("/","\/","$this->keyword");
                        $keyword_html = preg_quote($keyword_html);
                        $keyword_html = str_replace("/","\/","$keyword_html");
                        $this->contents .=  "<span class=\"extract\">";
                        if(preg_match_all("/((\s\S*){0,3})($this->keyword|$keyword_html)((\s?\S*){0,3})/i", $text, $match, PREG_SET_ORDER)); {
                            if(!$this->limit_extracts)
                                $number=count($match);
                            else
                                $number=$this->limit_extracts;
                                for ($h=0;$h<$number;$h++) {
                                    if (!empty($match[$h][3]))
                                        $this->contents .= sprintf("<i><b>..</b> %s<b>%s</b>%s <b>..</b></i>", $match[$h][1], $match[$h][3], $match[$h][4]);
                                    }
                        }
                        $this->contents .=  "</span></p>\n";
                        flush();
                    }
                }
            }
            if ($count_hits == null){
                $this->contents .=  "<p>$this->message_F<b>" . htmlentities($this->keyword) . "</b>$this->message_G.</p>";
            }
        }
    }

}