PHP - Html Transfer Code

\/)?>/ise" ,"'<font color=\'{$color_2}\'>&lt;\\1 '.html_highlight_attr('\\2').'\\3&gt;</ font>'", $str);
        $str = preg_replace("/<(\/[a-z:]+)>/i" ,"<font color='{$color_2}'>&lt;\\1&gt;</font>", $str);
        $str = preg_replace("/<(!\-\-.*\-\-)>/sU" ,"<font color='{$color_3}'>&lt;\\1&gt;</font>", $str);
        $str = preg_replace("/<!style([^>]*)>(.*)<\/style!>/iseU" ,"'<font color=\'{$color_2}\'>&lt;STYLE '.html_highlight_attr('\\1').'&gt;</font><br />'.css_highlight(str_replace('\\\"','\"','\\2'), false).'<br /><font color=\'{$color_2}\'>&lt;/STYLE&gt;</font>'", $str);
        for($i=0; $i<count($arr_script); $i++) {
                $str = str_replace("
::script_{$i}::
", $arr_script[$i], $str);
        }
        $str = str_replace("</ font>", "</font>", $str);
        $str = str_replace("</ b>", "</b>", $str);
        $str = str_replace(" &gt;", "&gt;", $str);
        $str = str_replace("  "," &nbsp;",$str);
        $str = str_replace("\t"," &nbsp; &nbsp;",$str);
        return nl2br($str);
}


function get_file_pic($filename) {
        global $root_path;
        $ext = str_replace(".","",strrchr($filename,"."));
        $pic = $root_path."images/mime_type/{$ext}.gif";
        return file_exists($pic)?"$pic":$root_path."images/mime_type/attch.gif";
}


function get_dl_html($filename, $str = "") {
        return "<img src='".get_file_pic($filename)."' border='0'> <a href='$filename'>".(empty($str)?basename($filename):$str)."</a>";
}


function get_attach_html($filename, $id) {
        return "<img src='".get_file_pic($filename)."' border='0'> <a href='attach_manage.php?method=download&id=$id'>$filename</a>";
}


function get_vote_html($vote_idx, $message = ""){
        global $db_host, $db_user, $db_pass, $db_name;
        $db = new DB_Manager($db_host, $db_user, $db_pass);
        $db->Connect();
        $db->SelectDB($db_name);
        $db->Query("select * from mnms_poll where id=".$vote_idx);
        $record = $db->GetRS();
        $str = "";
        $db->close();
        unset($db);
        if($record) {
                $username = "dummy";
                $if_vote = !(strpos($record[vote_user], "

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