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  Classes of Micah Carrick  >  PHP Paypal IPN Integration Class  >  paypal.php  >  Download  
File: paypal.php
Role: Example script
Content type: text/plain
Description: Demonstration of using the class
Class: PHP Paypal IPN Integration Class
Process Paypal payment interactions
Author: By
Last change:
Date: 10 years ago
Size: 6,022 bytes
 

Contents

Class file image Download
<?php

/* PHP Paypal IPN Integration Class Demonstration File
 * 4.16.2005 - Micah Carrick, email@micahcarrick.com
 *
 * This file demonstrates the usage of paypal.class.php, a class designed
 * to aid in the interfacing between your website, paypal, and the instant
 * payment notification (IPN) interface. This single file serves as 4
 * virtual pages depending on the "action" varialble passed in the URL. It's
 * the processing page which processes form data being submitted to paypal, it
 * is the page paypal returns a user to upon success, it's the page paypal
 * returns a user to upon canceling an order, and finally, it's the page that
 * handles the IPN request from Paypal.
 *
 * I tried to comment this file, aswell as the acutall class file, as well as
 * I possibly could. Please email me with questions, comments, and suggestions.
 * See the header of paypal.class.php for additional resources and information.
*/

// Setup class
require_once('paypal.class.php'); // include the class file
$p = new paypal_class; // initiate an instance of the class
$p->paypal_url = 'https://www.sandbox.paypal.com/cgi-bin/webscr'; // testing paypal url
//$p->paypal_url = 'https://www.paypal.com/cgi-bin/webscr'; // paypal url
           
// setup a variable for this script (ie: 'http://www.micahcarrick.com/paypal.php')
$this_script = 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'];

// if there is not action variable, set the default action of 'process'
if (empty($_GET['action'])) $_GET['action'] = 'process';

switch (
$_GET['action']) {
   
   case
'process': // Process and order...

      // There should be no output at this point. To process the POST data,
      // the submit_paypal_post() function will output all the HTML tags which
      // contains a FORM which is submited instantaneously using the BODY onload
      // attribute. In other words, don't echo or printf anything when you're
      // going to be calling the submit_paypal_post() function.
 
      // This is where you would have your form validation and all that jazz.
      // You would take your POST vars and load them into the class like below,
      // only using the POST values instead of constant string expressions.
 
      // For example, after ensureing all the POST variables from your custom
      // order form are valid, you might have:
      //
      // $p->add_field('first_name', $_POST['first_name']);
      // $p->add_field('last_name', $_POST['last_name']);
     
     
$p->add_field('business', 'YOUR PAYPAL (OR SANDBOX) EMAIL ADDRESS HERE!');
     
$p->add_field('return', $this_script.'?action=success');
     
$p->add_field('cancel_return', $this_script.'?action=cancel');
     
$p->add_field('notify_url', $this_script.'?action=ipn');
     
$p->add_field('item_name', 'Paypal Test Transaction');
     
$p->add_field('amount', '1.99');

     
$p->submit_paypal_post(); // submit the fields to paypal
      //$p->dump_fields(); // for debugging, output a table of all the fields
     
break;
     
   case
'success': // Order was successful...
  
      // This is where you would probably want to thank the user for their order
      // or what have you. The order information at this point is in POST
      // variables. However, you don't want to "process" the order until you
      // get validation from the IPN. That's where you would have the code to
      // email an admin, update the database with payment status, activate a
      // membership, etc.
 
     
echo "<html><head><title>Success</title></head><body><h3>Thank you for your order.</h3>";
      foreach (
$_POST as $key => $value) { echo "$key: $value<br>"; }
      echo
"</body></html>";
     
     
// You could also simply re-direct them to another page, or your own
      // order status page which presents the user with the status of their
      // order based on a database (which can be modified with the IPN code
      // below).
     
     
break;
     
   case
'cancel': // Order was canceled...

      // The order was canceled before being completed.
 
     
echo "<html><head><title>Canceled</title></head><body><h3>The order was canceled.</h3>";
      echo
"</body></html>";
     
      break;
     
   case
'ipn': // Paypal is calling page for IPN validation...
  
      // It's important to remember that paypal calling this script. There
      // is no output here. This is where you validate the IPN data and if it's
      // valid, update your database to signify that the user has payed. If
      // you try and use an echo or printf function here it's not going to do you
      // a bit of good. This is on the "backend". That is why, by default, the
      // class logs all IPN data to a text file.
     
     
if ($p->validate_ipn()) {
         
        
// Payment has been recieved and IPN is verified. This is where you
         // update your database to activate or process the order, or setup
         // the database with the user's order details, email an administrator,
         // etc. You can access a slew of information via the ipn_data() array.
 
         // Check the paypal documentation for specifics on what information
         // is available in the IPN POST variables. Basically, all the POST vars
         // which paypal sends, which we send back for validation, are now stored
         // in the ipn_data() array.
 
         // For this example, we'll just email ourselves ALL the data.
        
$subject = 'Instant Payment Notification - Recieved Payment';
        
$to = 'YOUR EMAIL ADDRESS HERE'; // your email
        
$body = "An instant payment notification was successfully recieved\n";
        
$body .= "from ".$p->ipn_data['payer_email']." on ".date('m/d/Y');
        
$body .= " at ".date('g:i A')."\n\nDetails:\n";
        
         foreach (
$p->ipn_data as $key => $value) { $body .= "\n$key: $value"; }
        
mail($to, $subject, $body);
      }
      break;
 }

?>