Current File : /home2/selectio/public_html/bharath/application/libraries/Paypal_lib.php
<?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', $value);
}
function image($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 style="text-align:center;">' . "\n";
echo '<p style="text-align:center;">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.
$post_string = '';
if ($this->CI->input->post()) {
foreach ($this->CI->input->post() as $field => $value) {
$this->ipn_data[$field] = $value;
$post_string .= $field . '=' . urlencode(stripslashes($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 (preg_match("/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";
}
function curlPost($paypalurl, $paypalreturnarr) {
$req = 'cmd=_notify-validate';
foreach ($paypalreturnarr as $key => $value) {
$value = urlencode(stripslashes($value));
$req .= "&$key=$value";
}
$ipnsiteurl = $paypalurl;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $ipnsiteurl);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
$result = curl_exec($ch);
curl_close($ch);
return $result;
}
}
?>
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