How to get more contents from url using curl

HI I have a function to get the contents from a url using the curl and its called file_get_contents_curl($url); Now the issue is I am getting only limited contents what we want to do is download more content, possible couple of paragraph and save it in our database.

function file_get_contents_curl($url) {
        $agent = 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.0.3705; .NET CLR 1.1.4322)';

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_HEADER, 1);
        curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookie.txt');
        curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookie.txt');
        curl_setopt($ch, CURLOPT_COOKIESESSION, 1);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_URL, $url);
        //curl_setopt($ch, CURLOPT_REFERER, $url);
        //curl_setopt($ch, CURLOPT_URL, 'https://graph.facebook.com/v1.0/?id='. urlencode($url). '&scrape=1');
        //curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
        //curl_setopt($ch, CURLOPT_MAXREDIRS,10);
        //curl_setopt($ch, CURLOPT_NOBODY, true); 
        //curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');  
       
        curl_setopt($ch, CURLOPT_USERAGENT, $agent);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        //curl_setopt($ch, CURLOPT_VERBOSE, true);

        $data = curl_exec($ch);
        $info = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
        //$info = curl_getinfo($ch) ;
        $err = curl_error($ch);
        $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        $eff_url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
        
        //checking mime types

        if(strstr($info,'text/html')) {
            curl_close($ch);
            return $data;
        } elseif(strstr($info,'text/plain')) {
            curl_close($ch);
            $data = shell_exec ('/usr/bin/curl' . ' ' . $url);
            return $data;
        } else {
            return false;
        }
    }

Please assist how will I achieve this behavior. Thank you.