cURL and Paypal not working

I'm using a form to send the item_name of the donation and the amount to a local PHP script on the page, however, the script just sends me to paypal.com and not the donation page. I see nothing wrong, it all checks out but doesn't do it's job. Here's the local script:

<?php
    function datapost($URLServer,$postdata)
    {
    $agent = "Mozilla/5.0";

    $cURL_Session = curl_init();

    curl_setopt($cURL_Session, CURLOPT_URL,$URLServer);

    curl_setopt($cURL_Session, CURLOPT_USERAGENT, $agent);

    curl_setopt($cURL_Session, CURLOPT_POST, 1);

    curl_setopt($cURL_Session, CURLOPT_POSTFIELDS,$postdata);

    curl_setopt($cURL_Session, CURLOPT_RETURNTRANSFER, 1);

    curl_setopt($cURL_Session, CURLOPT_FOLLOWLOCATION, 1);

    $result = curl_exec ($cURL_Session);

    }



    $htmlsource= datapost("https://www.paypal.com/cgi-bin/webscr","cmd=_donations&business=example@msn.com&notify_url=http://example.net/donate/paypal.php?action=ipn&return=http://example.net/donate/thankyou.php&rm=2&no_note=1&cbt=Back&no_shipping=1&lc=US&currency_code=USD&item_name=".$_POST['item_name']."&amount=".$_POST['amount']."&bn=PP-DonationsBF:btn_donate_LG.gif:NonHostedGuest");
    ?&g开发者_高级运维t;

And the form which sends it:

    <form action="http://example.net/beta/index.php" method="post" class="payPalForm" id="paypal">
        <div>
                  <div class="formRow">
                   <div class="hidden" id="error" style="width:100%"><h3> I'm sorry, that STEAM ID you entered was incorrect.</h3></div>
                        </div>
                <div class="formRow">

                <label for="field0">
                   Steam ID<span class="star">*</span>:                </label>
                                        <input type="text" name="item_name" id="item_name" class="textField required" />

                </div>


                <div class="formRow">

                <label for="field2">
                    Amount:                </label>

                        <select name="amount" id="field2" class="select">                    
                                                        <option  value="5">$5</option>
                                                            <option  value="10">$10</option>
                                                            <option  value="15">$15</option>
                                                            <option  value="20">$20</option>   
                                                            <option  value="25">$25</option>
                                                            <option  value="30">$30</option>
                                                            <option  value="35">$35</option>                                                            
                        </select>

                </div>

            <div class="formRow">
           <input type="submit" value="Donate" id="donatebtn" onclick="return verifySteamID()" />
        </div>
</form>

It does send to the script otherwise it wouldn't be able to go to paypal.com because that is not stated anywhere else. I don't understand why it's not working, any ideas?

---

I'm not sure if you are still experiencing this problem, we found that under some scenarios CURLOPT_FOLLOWLOCATION does not perform as expected. This is usually a server configuration issue and sometimes not something you can easily change.

To work around this problem we wrote the functions (below) which combined with a CURL call gave us the solution we required:

function curl_redir_exec($ch,$test = false)
    {
    static $curl_loops = 0;
    static $curl_max_loops = 20;
    if ($curl_loops++>= $curl_max_loops)
    {
    $curl_loops = 0;
    return FALSE;
    }
    curl_setopt($ch, CURLOPT_HEADER, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $data = curl_exec($ch);
    list($header, $data) = explode("\n\n", $data, 2);
    $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    if ($http_code == 301 || $http_code == 302)
    {
    $matches = array();
    preg_match('/Location:(.*?)\n/', $header, $matches);
    $url = @parse_url(trim(array_pop($matches)));
    if (!$url){
        //couldn't process the url to redirect to
        $curl_loops = 0;
        return $data;
    }
    $last_url = parse_url(curl_getinfo($ch, CURLINFO_EFFECTIVE_URL));
    if (!$url['scheme'])
    $url['scheme'] = $last_url['scheme'];
    if (!$url['host'])
    $url['host'] = $last_url['host'];
    if (!$url['path'])
        $url['path'] = $last_url['path'];
        $new_url = $url['scheme'] . '://' . $url['host'] . $url['path'] . ($url['query']?'?'.$url['query']:'');
        curl_setopt($ch, CURLOPT_URL, $new_url);
        return $this->curl_redir_exec($ch);
    } else {
        $curl_loops=0;
        if($test){
            return curl_getinfo($ch, CURLINFO_EFFECTIVE_URL).'<br />'.$http_code.'<br />'.$data;
        }else{
            return curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
        }
    }
}

function curl_post_fields($array){
    foreach ($array as $key=>$value){
        $arr_output[] = trim($key).'='.trim($value);
    }
    return preg_replace('#(\r\n|\r|\n)+#m',"",trim(implode('&', $arr_output)));
}

With the full CURL call looking like this:

$data2 = $fn->curl_post_fields($data1);
$curl_session = curl_init($url);
curl_setopt($curl_session, CURLOPT_URL, $url);
curl_setopt($curl_session, CURLOPT_COOKIESESSION, 1);
curl_setopt($curl_session, CURLOPT_FRESH_CONNECT, 1);
curl_setopt($curl_session, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB;) Firefox/3.6.13");
curl_setopt($curl_session, CURLOPT_HTTPHEADER, array('X-Forwarded-For: '.$_SERVER['REMOTE_ADDR']));
curl_setopt($curl_session, CURLOPT_VERBOSE, 1);
curl_setopt($curl_session, CURLOPT_POST, 1);
curl_setopt($curl_session, CURLOPT_POSTFIELDS, $data2);
curl_setopt($curl_session, CURLOPT_TIMEOUT, 30);
curl_setopt($curl_session, CURLOPT_SSL_VERIFYPEER, FALSE);
$redirect_url = $shop->curl_redir_exec($curl_session);
if(curl_errno($curl_session))
{
    echo '<p>An error has occurred, please take note of the information below and contact support.</p>';
    echo "<br>Errno : ".curl_errno($curl_session) ."<br>";
    echo "<br>Error : ".curl_error($curl_session) ."<br>";
    die();
}
curl_close($curl_session);
header("location:$redirect_url");

I hope this is useful to you.