Authorize.Net transaction postback handler

postback.php

<?php
/**
 * Example Authorize.Net transaction postback handler.
 * Writes transaction records to a MySQL database.
 *
 * Uses the Authorize.Net PHP SDK, which can be found at:
 * https://github.com/AuthorizeNet/sdk-php
 *
 * Example HTML form:
 *
 * <form method='post' action="https://secure.authorize.net/gateway/transact.dll">
 * <INPUT TYPE=HIDDEN NAME="x_Cust_ID" VALUE="Tom">
 * <INPUT TYPE=HIDDEN NAME="x_Description" VALUE="MyPurchase">
 * <input type='hidden' name="x_login" value="<?php echo $api_login_id?>" />
 * <input type='hidden' name="x_fp_hash" value="<?php echo $fingerprint?>" />
 * <input type='hidden' name="x_amount" value="<?php echo $amount?>" />
 * <input type='hidden' name="x_fp_timestamp" value="<?php echo $fp_timestamp?>" />
 * <input type='hidden' name="x_fp_sequence" value="<?php echo $fp_sequence?>" />
 * <input type='hidden' name="x_version" value="3.1">
 * <input type='hidden' name="x_show_form" value="payment_form">
 * <input type='hidden' name="x_test_request" value="false" />
 * <input type='hidden' name="x_method" value="cc">
 * <input type='submit' value="Submit">
 * </form>
 *
 * (c) Jack Peterson ([email protected]), 4/2/2014
 */

// Import the Authorize.Net PHP SDK
require_once 'php_sdk/AuthorizeNet.php';

// Connect to your MySQL database
function make_db_connection() {

    // Enter your database connection info here
    $db_name = '';
    $db_user = '';
    $db_pass = '';

    // Connect using mysqli
    $db = new mysqli($db_host, $db_user, $db_pass, $db_name);
    if ($db->connect_errno) {
        exit();
    }
    return $db;
}

// Insert the postback transaction record into your database
function insert_into_db($postback) {
    
    $db = make_db_connection();
    
    $sql = "INSERT INTO transactions (x_response_code,
                                      x_response_reason_code,
                                      x_response_reason_text,
                                      x_auth_code,
                                      x_avs_code,
                                      x_trans_id,
                                      x_method,
                                      x_card_type,
                                      x_account_number,
                                      x_first_name,
                                      x_last_name,
                                      x_company,
                                      x_address,
                                      x_city,
                                      x_state,
                                      x_zip,
                                      x_country,
                                      x_phone,
                                      x_fax,
                                      x_email,
                                      x_invoice_num,
                                      x_description,
                                      x_type,
                                      x_cust_id,
                                      x_amount,
                                      x_tax,
                                      x_tax_exempt,
                                      x_po_num,
                                      x_MD5_Hash,
                                      x_cvv2_resp_code,
                                      x_cavv_response,
                                      x_test_request,
                                      x_catalog_link_id,
                                      x_method_available) 
            VALUES 
                (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?,
                 ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";

    // Parametrize and execute the query
    $stmt = $db->stmt_init();
    $stmt->prepare($sql);
    $stmt->bind_param('ssssssssssssssssssssssssssssssssss',
                       $postback['x_response_code'],
                       $postback['x_response_reason_code'],
                       $postback['x_response_reason_text'],
                       $postback['x_auth_code'],
                       $postback['x_avs_code'],
                       $postback['x_trans_id'],
                       $postback['x_method'],
                       $postback['x_card_type'],
                       $postback['x_account_number'],
                       $postback['x_first_name'],
                       $postback['x_last_name'],
                       $postback['x_company'],
                       $postback['x_address'],
                       $postback['x_city'],
                       $postback['x_state'],
                       $postback['x_zip'],
                       $postback['x_country'],
                       $postback['x_phone'],
                       $postback['x_fax'],
                       $postback['x_email'],
                       $postback['x_invoice_num'],
                       $postback['x_description'],
                       $postback['x_type'],
                       $postback['x_cust_id'],
                       $postback['x_amount'],
                       $postback['x_tax'],
                       $postback['x_tax_exempt'],
                       $postback['x_po_num'],
                       $postback['x_MD5_Hash'],
                       $postback['x_cvv2_resp_code'],
                       $postback['x_cavv_response'],
                       $postback['x_test_request'],
                       $postback['x_catalog_link_id'],
                       $postback['x_method_available']);
    $stmt->execute();

    // Close the bound statement and database connection
    $stmt->close();
    $db->close();
}

// Main block
if (!count(debug_backtrace()))
{
    // Insert your API login ID and transaction key here
    $api_login_id = '';
    $transaction_key = '';
    $amount = '1.00';
    $fp_timestamp = time();

    // Enter an invoice or other unique number
    $fp_sequence = '123' . time();

    // Get the Authorize.Net SIM fingerprint
    $fingerprint = AuthorizeNetSIM_Form::getFingerprint($api_login_id,
                                                        $transaction_key,
                                                        $amount,
                                                        $fp_sequence,
                                                        $fp_timestamp)

    // Example postback data
    $postback_data = Array(
        'x_response_code' => 1,
        'x_response_reason_code'=> 1,
        'x_response_reason_text' => 'This transaction has been approved.',
        'x_avs_code' => 'Z',
        'x_auth_code' => '02181R',
        'x_trans_id' => 6014951032,
        'x_method' => 'CC',
        'x_card_type' => 'Discover',
        'x_account_number' => 'XXXX0000',
        'x_first_name' => 'John',
        'x_last_name' => 'Public',
        'x_company' => '',
        'x_address' => '101 Main Street',
        'x_city' => 'Anytown',
        'x_state' => 'CA',
        'x_zip' => '00000',
        'x_country' => 'USA',
        'x_phone' => '',
        'x_fax' => '',
        'x_email' => '[email protected]',
        'x_invoice_num' => '',
        'x_description' => '',
        'x_type' => 'auth_capture',
        'x_cust_id' => '',
        'x_ship_to_first_name' => 'John',
        'x_ship_to_last_name' => 'Public',
        'x_ship_to_company' => '101 Main Street',
        'x_ship_to_address' => '',
        'x_ship_to_city' => 'Anytown',
        'x_ship_to_state' => 'CA',
        'x_ship_to_zip' => '00000',
        'x_ship_to_country' => 'USA',
        'x_amount' => '1.00',
        'x_tax' => '0.00',
        'x_duty' => '0.00',
        'x_freight' => '0.00',
        'x_tax_exempt' => 'FALSE',
        'x_po_num' => '',
        'x_MD5_Hash' => 'F18E1B5AB7E265FEB11DCD0334ABEA51',
        'x_cvv2_resp_code' => 'S',
        'x_cavv_response' => '',
        'x_test_request' => 'false',
        'x_catalog_link_id' => 'f901720b-5a45-4cc4-b26e-faa2bc311ab5',
        'x_method_available' => 'true'
    );
    insert_into_db($postback_data);
}