How can I post data and get the results from the action page with PHP?

I have a web page called ABC. This web page contains a form with just one input, "ID". When you type your ID and submit it, it sends your ID to the server and prints your information on another page.

I know the form page's web address but not the result page's.

I want to post an ID to that form from my script and get the result page into a variable.

The code so far that I tried:

function getUrl($url, $method='', $vars=''){

    $ch = curl_init();
    if ($method == 'post') {
        $str = "";
        foreach( $vars as $var => $ele){
            $str .= $var;
            $str .= "=";
            $str .= $ele;
            $str .= "&";
        }
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $str);
    }
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_COOKIEJAR, 'asd.txt');
    curl_setopt($ch, CURLOPT_COOKIEFILE, 'asd.txt');
    curl_setopt($ch, CURLOPT_TIMEOUT, 50000);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 50000);

    $buffer = curl_exec($ch);
    curl_close($ch);
    unset($ch);
    return $buffer;
}

$loginUrl = 'http://app2.sgk.gov.tr/AylikHesap/servlet/';
$loginFields = array('mernisno'=>'xxx');
$remotePageUrl = 'http://app2.sgk.gov.tr/AylikHesap/servlet/com.sgk.aylikhesap.servlet.EventMultiplexer';  

$login = getUrl($loginUrl, 'post', $loginFields);

$remotePage = getUrl($remotePageUrl);

echo $remotePage;

It should bring the results. xxx is the ID that I'm talking about.

How do I do that?

Answers

You can use Zend_Http_Client for this

$client = new Zend_Http_Client();
$client->setUri('http://example.com/login.php');
$client->setParameterPost('ID', 1234);
$response = $client->request('POST');
$result = $response->getBody();

If you do not want to use Zend Framework for any reason, you can use this function.

CSRF

You can retrieve data from a site, but most site's implement some sort of token validation, so in other words you can't post form data across domains.

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