基于Podio的webform的cURL问题

Question

I have to say I am a noob in coding. I've learning because of the need of solving some issues in my website. This plugin is a webform I took from the same organization in another country. It has the function of working as a webfrom sending data to two different CRM tools, as well as it allows the file to reload into the thanks-for-signing-up page. However, it is only working partially, creating blank items on one of the CRM, failing in sending information to the other, and the reload is not working at all(Only works if I change the position of the function to the top of the code). In localhost, it also shows a cURL error. I want help to identify the possible mistakes in the code. Once again, I don't really have a deep experience in coding.

    <?php

if (!isset($_POST['action'])) 
{
//If not isset -> set with dumy value 
$_POST['action'] = "undefine"; 
}


include_once 'podio-php/PodioAPI.php';
    //Podio submit
    // This is to test the conection with the podio API and the authentication
    Podio::setup('podio-expa', 'p1hnJ6ASoST8x3nS68IjkEDPEbhMr7vS8ORPpyNaGJAHARqxig8k7kXZShx2rJcu');
    try {
            Podio::authenticate_with_app(21923212, '8093fc3ad3064b32b5e6d040e7d0e797');
            $v1 = $_POST['first_name'].'  '.$_POST['last_name'];
            $v2 = $_POST['edad'];
            $v3 = $_POST['email'];
            $v4 = $_POST['password'];
            $v5 = $_POST['phone'];
            $v6 = $_POST['ciudad'];
            $v7 = $_POST['universidad'];
            $vlc = $_POST['localcommittee'];
            list($v8, $v15) = explode("|", $vlc);
            $v9 = $_POST['carrera'];
            $v10 = $_POST['ciclo'];
            $v11 = $_POST['experiencia'];
            $v12 = $_POST['interested_in'];
            $v13 = $_POST['source'];
            $v14 = $_POST['interested_when'];
            $fields =   new PodioItemFieldCollection(array(
                            new PodioTextItemField(array("external_id" => "titulo", "values" => $v1)),
                            new PodioTextItemField(array("external_id" => "edad",  "values" => $v2)),
                            new PodioTextItemField(array("external_id" => "email", "values" => $v3)),
                            new PodioTextItemField(array("external_id" => "celular", "values" => $v5)),
                            new PodioCategoryItemField(array("external_id" => "region-en-la-que-estudias", "value"  => intval($v6))),
                            new PodioCategoryItemField(array("external_id" => "universidades-2", "values"           => intval($v7))),
                            new PodioCategoryItemField(array("external_id" => "comite", "values"                => intval($v8))),
                            new PodioCategoryItemField(array("external_id" => "campo-de-estudios", "values"         => intval($v9))),
                            new PodioCategoryItemField(array("external_id" => "ciclo-de-estudios", "values"         => intval($v10))),
                            new PodioCategoryItemField(array("external_id" => "como-te-enteraste-de-nosotros", "values" => intval($v13))),
                            new PodioCategoryItemField(array("external_id" => "como-te-enteraste-de-nosotros", "values" => intval($v14)))
                        ));

            // new PodioCategoryItemField(array("external_id" => "programa-de-interes", "values"    => intval($v12))),


            // Create the item object with fields
            // Be sure to add an app or podio-php won't know where to create the item
            $item = new PodioItem(array (   'app' => new PodioApp(21923212), // Attach to app with app_id=123
                                            'fields' => $fields
                                        ));

            // Save the new item
            $item->save();
        }

    catch (PodioError $e) 
        {
            // Something went wrong. Examine $e->body['error_description'] for a description of the error.
            echo $e;

            echo '<SCRIPT LANGUAGE="JavaScript">';
        echo "alert('ERROR');";
        echo "alert('$e');";
        echo "</SCRIPT>";
        }

        if (!function_exists('is_iterable'))
        {
                function is_iterable()
                {
                    function is_iterable($var){
                        return $var !== null 
                                && (is_array($var) 
                                    || $var instanceof Traversable 
                                    || $var instanceof Iterator 
                                    || $var instanceof IteratorAggregate);
                    }
                }
        }

    /*FH
    $referral_type_num = intval($_POST['source']);

    $referral_type = '';

    if($referral_type_num == 1 or $referral_type_num == 2){
      $referral_type = 'Facebook';
    }
    else if ($referral_type_num == 7){
      $referral_type = 'Friend';
    }else if ($referral_type_num == 3){
      $referral_type = 'Other social media channel';
    }else if ($referral_type_num == 12 || $referral_type_num == 14){
      $referral_type = 'Other social media channel';
    }else if ($referral_type_num == 11){
      $referral_type = 'Event';
    }else if ($referral_type_num == 5){
      $referral_type = 'Instagram';
    }else if ($referral_type_num == 4){
      $referral_type = 'Twitter';
    }else if ($referral_type_num == 6){
      $referral_type = 'LinkedIn';
    }else if ($referral_type_num == 16){
      $referral_type = 'Search engine';
    }else if ($referral_type_num == 10){
      $referral_type = 'Information booth on campus';
    }
    else {
      $referral_type = 'Other';
    }
    */

     $referral_type = 'Other';

    // structure data for GIS
    // form structure taken from actual form submission at auth.aiesec.org/user/sign_in

    $configs = include_once('config.php');

    $fields = array(
        'authenticity_token' => htmlspecialchars($gis_token),
        'user[email]' => htmlspecialchars($v3),
        'user[first_name]' => htmlspecialchars($_POST['first_name']),
        'user[last_name]' => htmlspecialchars($_POST['last_name']),
        'user[password]' => htmlspecialchars($_POST['password']),
            'user[phone]' => htmlspecialchars($_POST['phone']), //ConFe
            'user[allow_phone_communication]' => htmlspecialchars($_POST['user_allow_phone_communication']), //Permitir el contacto telefónico      
        'user[country]' => $configs["country_name"], //'POLAND', // EXAMPLE: 'GERMANY' 
        'user[mc]' => $configs["mc_id"], //'1626', // EXAMPLE: 1596
        'user[lc_input]' => $user_lc,
        'user[lc]' => $user_lc,
        'user[referral_type]' => $referral_type,
        'commit' => 'REGISTER'
        );


    $fields_string = "";
    foreach($fields as $key=>$value) { $fields_string .= $key.'='.urlencode($value).'&'; }
    rtrim($fields_string, '&');
    $innerHTML = "";
    /* UNCOMMENT THIS BLOCK: to enable real GIS form submission*/


    // POST form with curl
    $url = "https://auth.aiesec.org/users";
    $ch2 = curl_init();
    curl_setopt($ch2, CURLOPT_URL, $url);
    curl_setopt($ch2, CURLOPT_POST, count($fields));
    curl_setopt($ch2, CURLOPT_POSTFIELDS, $fields_string);

    curl_setopt($ch2, CURLOPT_RETURNTRANSFER, TRUE);
    // give cURL the SSL Cert for Salesforce
    curl_setopt($ch2, CURLOPT_SSL_VERIFYPEER, false); // TODO: FIX SSL - VERIFYPEER must be set to true
    //
    // "without peer certificate verification, the server could use any certificate,
    // including a self-signed one that was guaranteed to have a CN that matched 
    // the server’s host name."
    // http://unitstep.net/blog/2009/05/05/using-curl-in-php-to-access-https-ssltls-protected-sites/
    // 
    // curl_setopt($ch2, CURLOPT_SSL_VERIFYHOST, 2);
    // curl_setopt($ch2, CURLOPT_CAINFO, getcwd() . "\CACerts\VeriSignClass3PublicPrimaryCertificationAuthority-G5.crt");
    $result = curl_exec($ch2);

    curl_errors($ch2);
    //close connection
    curl_close($ch2);
    //echo $result;
    libxml_use_internal_errors(true);
    $doc = new DOMDocument();
    $doc->loadHTML($result);    
    libxml_clear_errors();
    $selector = new DOMXPath($doc);

    $result = $selector->query('//div[@id="error_explanation"]');

    $children = $result->item(0)->childNodes;
    if (is_iterable($children))
    {
        foreach ($children as $child) {
            $tmp_doc = new DOMDocument();
            $tmp_doc->appendChild($tmp_doc->importNode($child,true));  
            $innerHTML .= strip_tags($tmp_doc->saveHTML());
            //$innerHTML.add($tmp_doc->saveHTML());
        }
    }

    $innerHTML = preg_replace('~[
]+~', '', $innerHTML);
    $innerHTML = str_replace(array('"', "'"), '', $innerHTML);

    header("Location: https://www.aiesec.cl/final.html");

    function curl_errors($ch)
    {
        $http_status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        $curl_errno= curl_errno($ch);
       echo "<h2>cURL errors</h2>";
       echo $http_status."<br>";
       echo $curl_errno.": ".curl_error($ch)."<br>";
    }

?>

Thanks in advance.