search application help - Printable Version

Code:
class Search extends Controller {

    private $keyword = null;

    private $error = null;

    private $local = 0;

    private $min_chars = 3;

    private $max_chars = 30;

    private $boundary = '&lt;!-- SEARCH BOUNDARY --&gt;';

    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>";

            }

        }

    }



}