Webhook to send instapage form to silverpop database

Silverpop_instapage_webhook.php

<?php
/**
 * Silverpop Instapage webhook
 */

// Instapage System vars
$page_id = $_POST[ 'page_id' ];
$page_url = $_POST[ 'page_url' ];
$variant = $_POST[ 'variant' ];

/**
* DOWNLOAD THE COMPOSER DEPENDENCIE
* https://github.com/simpleweb/SilverpopPHP
**/

//-------------| SILVER POP - CONFIG |----------------

// Include the library
require_once 'vendor/autoload.php';
// Require the Silverpop Namespace
use Silverpop\EngagePod;

// Sent mail function
function shooting_mail(){


    //--| INSTAPAGE VAR - CONFIG |--
    // Mapp all instapage fields to a variable
    $action = trim( strip_tags( $_POST[ 'action' ] ) );
    $name = trim( strip_tags( $_POST[ 'name' ] ) );
    $firstname = trim( strip_tags( $_POST[ 'firstname' ] ) );
    $email = trim( strip_tags( $_POST[ 'email' ] ) );
    $phone = trim( strip_tags( $_POST[ 'phone' ] ) );
    $country = trim( strip_tags( $_POST[ 'country' ] ) );
    $source = trim( strip_tags( $_POST[ 'source' ] ) );
    //----
    
    /*
    * Add an hidden field to capture the "source"
    */


// Set some useful silverpop variables
    $databaseID   = 'xxx'; //Your Database ID

// Silverpop login
    $silverpop = new EngagePod(array(
        'username'       => 'xxx',
        'password'       => 'xxx',
        'engage_server'  => 3,
    ));

// Add a record to a contact
// Check EngagedPod.php file for some doc on Silverpop functions 
    $recipientID = $silverpop->addContact(
        $databaseID,
        true,
        array(
            'name'  => $name,
            'firstname' => $firstname,
            'email' => $email,
            'phone' => $phone,
            'country' => $country
        ),
        false,
        true,
        true
    );
}
//------------------------------------------------

//-------------| FORM ACTION |--------------------
// Add a hidden input on top  of the form  with send_mail as value.  
//  <input type="hidden" name="action" value="send_mail">
$_action = isset($_REQUEST['action']) ? $_REQUEST['action'] : '';
if ( 'send_mail' == $_action ) {
    shooting_mail();
    exit();
}
//------------------------------------------------