Authorize.net Transaction Using PHP

Copy this script to a file authorizenet.class.php Select all

<?php
/*******************************************************************************
 * Authorize.net AIM Interface using CURL
 *******************************************************************************
 * Author: Micah Carrick
 * Email: email@micahcarrick.com
 * Website: N/A
 *
 * File: authorizenet.class.php
 * Version: 1.00
 * Copyright: (c) 2005 - Micah Carrick 
 * You are free to use, distribute, and modify this software 
 * under the terms of the GNU General Public License. See the
 * included license.txt file.
 * 
 *******************************************************************************
 * REQUIREMENTS:
 * - PHP4+ with CURL and SSL support
 * - An Authorize.net AIM merchant account
 * - (optionally) http://www.authorize.net/support/AIM_guide.pdf
 * 
 *******************************************************************************
 * VERION HISTORY:
 * 
 * v1.00 [04.07.2005] - Initial Version
 *
 *******************************************************************************
 * DESCRIPTION:
 *
 * This class was developed to simplify interfacing a PHP script to the
 * authorize.net AIM payment gateway. It does not do all the work for
 * you as some of the other scripts out there do. It simply provides
 * an easy way to implement and debug your own script. 
 * 
 *******************************************************************************
*/

class authorizenet_class {

var $field_string;
   var $fields = array();
   
   var $response_string;
   var $response = array();
   
   var $gateway_url = "https://secure.authorize.net/gateway/transact.dll";
   
   function add_field($field, $value) {
   
      // adds a field/value pair to the list of fields which is going to be 
      // passed to authorize.net.  For example: "x_version=3.1" would be one
      // field/value pair.  A list of the required and optional fields to pass
      // to the authorize.net payment gateway are listed in the AIM document
      // available in PDF form from www.authorize.net
      
      $this->fields["$field"] = urlencode($value);

}

}
   
   function get_response_reason_text() {
      return $this->response['Response Reason Text'];
   }

function dump_fields() {
 
 // Used for debugging, this function will output all the field/value pairs
 // that are currently defined in the instance of the class using the
 // add_field() function.
 
 echo "<h3>authorizenet_class->dump_fields() Output:</h3>";
 echo "<table width=\"95%\" border=\"1\" cellpadding=\"2\" cellspacing=\"0\">
 <tr>
 <td bgcolor=\"black\">Field Name</td>
 <td bgcolor=\"black\">Value</td>
 </tr>"; 
 
 foreach ($this->fields as $key => $value) {
 echo "<tr><td>$key</td><td>".urldecode($value)." </td></tr>";
 }
 
 echo "</table> "; 
 }

function dump_response() {
 
 // Used for debuggin, this function will output all the response field
 // names and the values returned for the payment submission. This should
 // be called AFTER the process() function has been called to view details
 // about authorize.net's response.
 
 echo "<h3>authorizenet_class->dump_response() Output:</h3>";
 echo "<table width=\"95%\" border=\"1\" cellpadding=\"2\" cellspacing=\"0\">
 <tr>
 <td bgcolor=\"black\">Index </td>
 <td bgcolor=\"black\">Field Name</td>
 <td bgcolor=\"black\">Value</td>
 </tr>";
 
 $i = 0;
 foreach ($this->response as $key => $value) {
 echo "<tr>
 <td valign=\"top\" align=\"center\">$i</td>
 <td valign=\"top\">$key</td>
 <td valign=\"top\">$value </td>
 </tr>";
 $i++;
 } 
 echo "</table> ";
 } 
}

Copy this script to a file demo.php Select all

<?php

/*  Demonstration on using authorizenet.class.php.  This just sets up a
 *  little test transaction to the authorize.net payment gateway.  You
 *  should read through the AIM documentation at authorize.net to get
 *  some familiarity with what's going on here.  You will also need to have
 *  a login and password for an authorize.net AIM account and PHP with SSL and
 *  curl support.
 *
 *  Reference http://www.authorize.net/support/AIM_guide.pdf for details on
 *  the AIM API.
*/

require_once('authorizenet.class.php');

$a = new authorizenet_class;

// You login using your login, login and tran_key, or login and password.  It
// varies depending on how your account is setup.
// I believe the currently reccomended method is to use a tran_key and not
// your account password.  See the AIM documentation for additional information.
 
$a->add_field('x_login', 'CHANGE THIS TO YOUR LOGIN');
$a->add_field('x_tran_key', 'CHANGE THIS TO YOUR TRANSACTION KEY');
//$a->add_field('x_password', 'CHANGE THIS TO YOUR PASSWORD');

$a->add_field('x_version', '3.1');
$a->add_field('x_type', 'AUTH_CAPTURE');
$a->add_field('x_test_request', 'TRUE');    // Just a test transaction
$a->add_field('x_relay_response', 'FALSE');

// You *MUST* specify '|' as the delim char due to the way I wrote the class.
// I will change this in future versions should I have time.  But for now, just
// make sure you include the following 3 lines of code when using this class.

$a->add_field('x_delim_data', 'TRUE');
$a->add_field('x_delim_char', '|');     
$a->add_field('x_encap_char', '');

// Setup fields for customer information.  This would typically come from an
// array of POST values froma secure HTTPS form.

$a->add_field('x_first_name', 'John');
$a->add_field('x_last_name', 'Smith');
$a->add_field('x_address', '1234 West Main St.');
$a->add_field('x_city', 'Some City');
$a->add_field('x_state', 'CA');
$a->add_field('x_zip', '12345');
$a->add_field('x_country', 'US');
$a->add_field('x_email', 'someone@somedomain.com');
$a->add_field('x_phone', '555-555-5555');

// Using credit card number '4007000000027' performs a successful test.  This
// allows you to test the behavior of your script should the transaction be
// successful.  If you want to test various failures, use '4222222222222' as
// the credit card number and set the x_amount field to the value of the 
// Response Reason Code you want to test.  
// 
// For example, if you are checking for an invalid expiration date on the
// card, you would have a condition such as:
// if ($a->response['Response Reason Code'] == 7) ... (do something)
//
// Now, in order to cause the gateway to induce that error, you would have to
// set x_card_num = '4222222222222' and x_amount = '7.00'

//  Setup fields for payment information
$a->add_field('x_method', 'CC');
$a->add_field('x_card_num', '4007000000027');   // test successful visa
//$a->add_field('x_card_num', '370000000000002');   // test successful american express
//$a->add_field('x_card_num', '6011000000000012');  // test successful discover
//$a->add_field('x_card_num', '5424000000000015');  // test successful mastercard
// $a->add_field('x_card_num', '4222222222222');    // test failure card number
$a->add_field('x_amount', '10.00');
$a->add_field('x_exp_date', '0308');    // march of 2008
$a->add_field('x_card_code', '123');    // Card CAVV Security code

// Process the payment and output the results
switch ($a->process()) {

case 1: // Successs
 echo "Success: ";
 echo $a->get_response_reason_text();
 echo " Details of the transaction are shown below... ";
 break;
 
 case 2: // Declined
 echo "Payment Declined: ";
 echo $a->get_response_reason_text();
 echo " Details of the transaction are shown below... ";
 break;
 
 case 3: // Error
 echo "Error with Transaction: ";
 echo $a->get_response_reason_text();
 echo " Details of the transaction are shown below... ";
 break;
}

// The following two functions are for debugging and learning the behavior
// of authorize.net's response codes.  They output nice tables containing
// the data passed to and recieved from the gateway.

$a->dump_fields();      // outputs all the fields that we set
$a->dump_response();    // outputs the response from the payment gateway