<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
* Code Igniter
*
* An open source application development framework for PHP 4.3.2 or newer
*
* @package CodeIgniter
* @author Rick Ellis
* @copyright Copyright (c) 2006, pMachine, Inc.
* @license http://www.codeignitor.com/user_guide/license.html
* @link http://www.codeigniter.com
* @since Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* PayPal_Lib Controller Class (Paypal IPN Class)
*
* This CI library is based on the Paypal PHP class by Micah Carrick
* See www.micahcarrick.com for the most recent version of this class
* along with any applicable sample files and other documentaion.
*
* This file provides a neat and simple method to interface with paypal and
* The paypal Instant Payment Notification (IPN) interface. This file is
* NOT intended to make the paypal integration "plug 'n' play". It still
* requires the developer (that should be you) to understand the paypal
* process and know the variables you want/need to pass to paypal to
* achieve what you want.
*
* This class handles the submission of an order to paypal as well as the
* processing an Instant Payment Notification.
* This class enables you to mark points and calculate the time difference
* between them. Memory consumption can also be displayed.
*
* The class requires the use of the PayPal_Lib config file.
*
* @package CodeIgniter
* @subpackage Libraries
* @category Commerce
* @author Ran Aroussi <ran@aroussi.com>
* @copyright Copyright (c) 2006, http://aroussi.com/ci/
*
*/
// ------------------------------------------------------------------------
class Paypal_lib {
var $last_error; // holds the last error encountered
var $ipn_log; // bool: log IPN results to text file?
var $ipn_log_file; // filename of the IPN log
var $ipn_response; // holds the IPN response from paypal
var $ipn_data = array(); // array contains the POST values for IPN
var $fields = array(); // array holds the fields to submit to paypal
var $submit_btn = ''; // Image/Form button
var $button_path = ''; // The path of the buttons
var $CI;
function Paypal_lib()
{
$this->CI =& get_instance();
$this->CI->load->helper('url');
$this->CI->load->helper('form');
$this->CI->load->config('paypallib_config');
//$this->paypal_url = 'https://www.paypal.com/cgi-bin/webscr';
$this->paypal_url = 'https://www.sandbox.paypal.com/cgi-bin/webscr';
$this->last_error = '';
$this->ipn_response = '';
$this->ipn_log_file = $this->CI->config->item('paypal_lib_ipn_log_file');
$this->ipn_log = $this->CI->config->item('paypal_lib_ipn_log');
$this->button_path = $this->CI->config->item('paypal_lib_button_path');
// populate $fields array with a few default values. See the paypal
// documentation for a list of fields and their data types. These defaul
// values can be overwritten by the calling script.
$this->add_field('rm','2'); // Return method = POST
$this->add_field('cmd','_xclick');
$this->add_field('currency_code', $this->CI->config->item('paypal_lib_currency_code'));
$this->add_field('quantity', '1');
$this->button('Pay Now!');
}
function button($value)
{
// changes the default caption of the submit button
//$this->submit_btn = form_submit('pp_submit', $value);
$data = array(
'content' => $value,
'name' => 'pp_submit',
'id' => 'pp_submit',
'class' => 'button',
);
$this->submit_btn = form_button($data);
}
function image($file)
{
$this->submit_btn = '<input type="image" name="add" src="' . site_url($this->button_path .'/'. $file) . '" border="0" />';
}
function add_field($field, $value)
{
// adds a key=>value pair to the fields array, which is what will be
// sent to paypal as POST variables. If the value is already in the
// array, it will be overwritten.
$this->fields[$field] = $value;
}
function paypal_auto_form()
{
// this function actually generates an entire HTML page consisting of
// a form with hidden elements which is submitted to paypal via the
// BODY element's onLoad attribute. We do this so that you can validate
// any POST vars from you custom form before submitting to paypal. So
// basically, you'll have your own form which is submitted to your script
// to validate the data, which in turn calls this function to create
// another hidden form and submit to paypal.
$this->button('Click here if you\'re not automatically redirected...');
echo '<html>' . "\n";
echo '<head><title>Processing Payment...</title></head>' . "\n";
echo '<body onLoad="document.forms[\'paypal_auto_form\'].submit();">' . "\n";
echo '<p>Please wait, your order is being processed and you will be redirected to the paypal website.</p>' . "\n";
echo $this->paypal_form('paypal_auto_form');
echo '</body></html>';
}
function paypal_form($form_name='paypal_form')
{
$str = '';
$str .= '<form method="post" action="'.$this->paypal_url.'" name="'.$form_name.'"/>' . "\n";
foreach ($this->fields as $name => $value)
$str .= form_hidden($name, $value) . "\n";
$str .= '<p>'. $this->submit_btn . '</p>';
$str .= form_close() . "\n";
return $str;
}
function validate_ipn()
{
// parse the paypal URL
$url_parsed = parse_url($this->paypal_url);
// generate the post string from the _POST vars aswell as load the
// _POST vars into an arry so we can play with them from the calling
// script.
$post_string = '';
if (isset($_POST))
{
foreach ($_POST as $field=>$value)
{
$this->ipn_data[$field] = $value;
$post_string .= $field.'='.urlencode(stripslashes(str_replace("\n", "\r\n", $value))).'&';
}
}
$post_string.="cmd=_notify-validate"; // append ipn command
// open the connection to paypal
$fp = fsockopen($url_parsed['host'],"80",$err_num,$err_str,30);
if(!$fp)
{
// could not open the connection. If loggin is on, the error message
// will be in the log.
$this->last_error = "fsockopen error no. $errnum: $errstr";
$this->log_ipn_results(false);
return false;
}
else
{
// Post the data back to paypal
fputs($fp, "POST $url_parsed[path] HTTP/1.1\r\n");
fputs($fp, "Host: $url_parsed[host]\r\n");
fputs($fp, "Content-type: application/x-www-form-urlencoded\r\n");
fputs($fp, "Content-length: ".strlen($post_string)."\r\n");
fputs($fp, "Connection: close\r\n\r\n");
fputs($fp, $post_string . "\r\n\r\n");
// loop through the response from the server and append to variable
while(!feof($fp))
$this->ipn_response .= fgets($fp, 1024);
fclose($fp); // close connection
}
if (eregi("VERIFIED",$this->ipn_response))
{
// Valid IPN transaction.
$this->log_ipn_results(true);
return true;
}
else
{
// Invalid IPN transaction. Check the log for details.
$this->last_error = 'IPN Validation Failed.';
$this->log_ipn_results(false);
return false;
}
}
function log_ipn_results($success)
{
if (!$this->ipn_log) return; // is logging turned off?
// Timestamp
$text = '['.date('m/d/Y g:i A').'] - ';
// Success or failure being logged?
if ($success) $text .= "SUCCESS!\n";
else $text .= 'FAIL: '.$this->last_error."\n";
// Log the POST variables
$text .= "IPN POST Vars from Paypal:\n";
foreach ($this->ipn_data as $key=>$value)
$text .= "$key=$value, ";
// Log the response from the paypal server
$text .= "\nIPN Response from Paypal Server:\n ".$this->ipn_response;
// Write to log
$fp=fopen($this->ipn_log_file,'a');
fwrite($fp, $text . "\n\n");
fclose($fp); // close file
}
function dump()
{
// 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.
ksort($this->fields);
echo '<h2>ppal->dump() Output:</h2>' . "\n";
echo '<code style="font: 12px Monaco, \'Courier New\', Verdana, Sans-serif; background: #f9f9f9; border: 1px solid #D0D0D0; color: #002166; display: block; margin: 14px 0; padding: 12px 10px;">' . "\n";
foreach ($this->fields as $key => $value) echo '<strong>'. $key .'</strong>: '. urldecode($value) .'<br/>';
echo "</code>\n";
}
}
?>
@KyuuKazami