Resolve Cpatcha

gistfile1.txt

<?php
$useragent = 'Mozilla/41.0.2';
$url = 'http://lucien.com';

$ch = curl_init();
curl_setopt($ch, CURLOPT_USERAGENT, $useragent);
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
$result=curl_exec ($ch);
curl_close ($ch);
function submit_answer($response) {
    $url = 'http://';

    // get captcha
    foreach(file($url) as $line) {
        if (preg_match('/(.*) \<input.*captcha/',$line,$m))
            $captcha=$m[1];
    }

    // solve captcha with this link contains the code that solve answer
    $answer = file_get_contents('http://www.ditelkin.com/openanswers_solution/openanswers.php'.urlencode($captcha));

    // submit the form
    $data = array(
        'result' => $response,
        'captcha' => $answer);

    $options = array(
        'http' => array(
            'header'  => "Content-type: application/x-www-form-urlencoded\r\n",
            'method'  => 'POST',
            'content' => http_build_query($data),
        ),
    );
    $context  = stream_context_create($options);
    $result = file_get_contents($url, false, $context);
    return $result;
}

Problems first where can I place this Script and if there are error