foreach ($urls as $k){
        $start = '';
        $online = strip_tags(implode(" ",@file($k)));
        $trans = get_html_translation_table (HTML_ENTITIES);
        foreach($trans as $key=>$var){
            $story = str_replace($var,$key,$online);
        }
        $start = strpos($story,$keywords[$i])+strlen($keywords[$i]);
        $uo[$i] = trim(substr($online,$start,3));
        $i++;
}

i use this little script with php 4.2.2 to parse other web communities to collect data inside a database who many users are online. After updating the php version, this script produces with an array of four elements three correct results and one trash result?