iloveitaly/paypal.php

## paypal.php
<?php

/*  PHP Paypal IPN Integration Class Demonstration File
 *  6.25.2008 - Eric Wang, http://code.google.com/p/paypal-ipn-class-php/
 *
 *  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.
 *
 *	If you want submit a payment form to Paypal sandbox. Please add the
 *	_GET[sandbox=1] parameter to link. ie: paypal.php?sandbox=1.
 *
 *  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.
*/

require_once('paypal_class.php');

$p = new paypal_class();
$p->sandbox = true;

if($p->sandbox) {
	$p->admin_mail = 'notification@gmail.com';
	$p->paypal_mail = 'owner@softwarebusiness.com';	// equivilent to: $p->add_field('business', 'email@domain.com')
} else {

}

// $p->admin_mail = EMAIL_ADD;
//$p -> paypal_mail = PAYPAL_EMAIL_ADD;  // If set, class will verify the receiver.

switch ($_GET['action']) {
   default:

		// 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.

		// adds or edits a "$p->add_field(key, value);" in following, which is what will be
		// sent to paypal as POST variables. Refer to PayPal HTML Variables:
		// https://cms.paypal.com/us/cgi-bin/?cmd=_render-content&content_ID=developer/e_howto_html_Appx_websitestandard_htmlvariables

		// 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.

		// setup a current URL variable for this script

		$this_script = 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'];

		$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('cmd', '_donations');
		$p->add_field('custom', 9);
		$p->add_field('rm', '2');	// Return method = POST

		$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':
		if ($p->validate_ipn()) {
			$subject = 'Instant Payment Notification - Received Payment';
			$p->send_report($subject);
		} else {
			$subject = 'Instant Payment Notification - Payment Fail';
			$p->send_report ( $subject );
		}
      break;
 }
?>

## paypal_class.php
<?php
/**
 * PHP Paypal IPN Integration Class
 * 6.25.2008 - Eric Wang, http://code.google.com/p/paypal-ipn-class-php/
 *
 * This file provides neat and simple method to validate the paid result with Paypal IPN.
 * It's NOT intended to make the paypal integration "plug 'n' play".
 * It still requires the developer to understand the paypal process and know the variables
 * you want/need to pass to paypal to achieve what you want.
 *
 * @author	 Eric Wang <eric.wzy@gmail.com>
 * @copyright	 (C) 2008 - 2009 Eric.Wang
 *
 */

define('LOG_FILE', 'ipn_results.log');
define('DEBUG_LOG_FILE', 'ipn_results_debug.log');

class paypal_class {
	private $ipn_status;

	public $admin_mail;				 // receive the ipn status report pre transaction
	public $paypal_mail;			 // paypal account, if set, class need to verify receiver
	public $txn_id;					 // array: if the txn_id array existed, class need to verified the txn_id duplicate
	private $ipn_response;													 // holds the IPN response from paypal
	public $ipn_data = array();								 // array contains the POST values for IPN
	private $fields = array();									 // array holds the fields to submit to paypal


	public $sandbox = false;
	private $ipn_debug = false;
	public $ipn_log = true;

 function __construct() {
	 $this->ipn_status = '';
	 $this->admin_mail = null;
	 $this->paypal_mail = null;
	 $this->txn_id = null;
	 $this->tax = null;
	 $this->ipn_response = '';
 }

 // adds a key=>value pair to the fields array, which is what will be
 // sent to paypal as POST variables.
 public function add_field($field, $value) {
	 $this->fields["$field"] = $value;
 }


 // 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.

 // The user will briefly see a message on the screen that reads:
 // "Please wait, your order is being processed..." and then immediately
 // is redirected to paypal.
	public function submit_paypal_post() {
		echo "<html>\n";
		echo "<head><title>Processing Payment...</title></head>\n";
		echo "<body onLoad=\"document.forms['paypal_form'].submit();\">\n";
		echo "<center><h2>Please wait, your order is being processed and you";
		echo " will be redirected to the paypal website.</h2></center>\n";
		echo "<form method=\"post\" name=\"paypal_form\" ";
		echo "action=\"".$this->getPaypalURL()."\">\n";

		if(isset($this->paypal_mail)) {
			echo "<input type=\"hidden\" name=\"business\" value=\"$this->paypal_mail\"/>\n";
		}

		foreach ($this->fields as $name => $value) {
			echo "<input type=\"hidden\" name=\"$name\" value=\"$value\"/>\n";
		}

		echo "<center><br/><br/>If you are not automatically redirected to ";
		echo "paypal within 5 seconds...<br/><br/>\n";
		echo "<input type=\"submit\" value=\"Click Here\"></center>\n";

		echo "</form>\n";
		echo "</body></html>\n";
	}

 public function validate_ipn() {
	 $hostname = gethostbyaddr ( $_SERVER ['REMOTE_ADDR'] );
	 if (! preg_match ( '/paypal\.com$/', $hostname )) {
		 $this->ipn_status = 'Validation post isn\'t from PayPal';
		 $this->log_ipn_results ( false );
		 return false;
	 }

	 if (isset($this->paypal_mail) && strtolower ( $_POST['receiver_email'] ) != strtolower(trim( $this->paypal_mail ))) {
		 $this->ipn_status = "Receiver Email Not Match";
		 $this->log_ipn_results ( false );
		 return false;
	 }

	 if (isset($this->txn_id) && in_array($_POST['txn_id'],$this->txn_id)) {
		 $this->ipn_status = "txn_id have a duplicate";
		 $this->log_ipn_results ( false );
		 return false;
	 }

	 // parse the paypal URL
	 $url_parsed = parse_url($this->getPaypalURL());

	 // 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.
	 $post_string = '';
	 foreach ($_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
	 if($this->sandbox) {
		 $fp = fsockopen('ssl://www.sandbox.paypal.com', "443", $err_num, $err_str, 60 );
	 } else {
		 $fp = fsockopen('ssl://www.paypal.com', "443", $err_num, $err_str, 60 );
	}

	 if(!$fp) {
		 // could not open the connection.	 If loggin is on, the error message
		 // will be in the log.
		 $this->ipn_status = "fsockopen error no. $err_num: $err_str";
		 $this->log_ipn_results(false);
		 return false;
	 } else {
		 // Post the data back to paypal
		 fputs($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);
	 }

	 // Invalid IPN transaction.	 Check the $ipn_status and log for details.
	 if (stristr($this->ipn_response, "VERIFIED") === FALSE) {
		 $this->ipn_status = 'IPN Validation Failed';
		 $this->log_ipn_results(false);
		 return false;
	 } else {
		 $this->ipn_status = "IPN VERIFIED";
		 $this->log_ipn_results(true);
		 return true;
	 }
}

 private function log_ipn_results($success) {
	 $hostname = gethostbyaddr ( $_SERVER ['REMOTE_ADDR'] );
	 // Timestamp
	 $text = '[' . date ( 'm/d/Y g:i A' ) . '] - ';
	 // Success or failure being logged?
	 if ($success)
		 $this->ipn_status = $text . 'SUCCESS:' . $this->ipn_status . "!\n";
	 else
		 $this->ipn_status = $text . 'FAIL: ' . $this->ipn_status . "!\n";
		 // Log the POST variables
	 $this->ipn_status .= "[From:" . $hostname . "|" . $_SERVER ['REMOTE_ADDR'] . "]IPN POST Vars Received By Paypal_IPN Response API:\n";
	 foreach ( $this->ipn_data as $key => $value ) {
		 $this->ipn_status .= "$key=$value \n";
	 }
	 // Log the response from the paypal server
	 $this->ipn_status .= "IPN Response from Paypal Server:\n" . $this->ipn_response;
	 $this->write_to_log();
 }

 private function write_to_log() {
	 if (! $this->ipn_log)
		 return; // is logging turned off?

	 $fp = fopen ( LOG_FILE , 'a' );
	 fwrite ( $fp, $this->ipn_status . "\n\n" );
	 fclose ( $fp ); // close file
	 chmod ( LOG_FILE , 0600 );
 }

 public function send_report($subject) {
	 $body .= "from " . $this->ipn_data ['payer_email'] . " on " . date ( 'm/d/Y' );
	 $body .= " at " . date ( 'g:i A' ) . "\n\nDetails:\n" . $this->ipn_status;
	 mail ( $this->admin_mail, $subject, $body );
 }

 public function print_report() {
	 $find [] = "\n";
	 $replace [] = '<br/>';
	 $html_content = str_replace ( $find, $replace, $this->ipn_status );
	 echo $html_content;
 }

	public function getPaypalURL() {
		return $this->sandbox ? 'https://www.sandbox.paypal.com/cgi-bin/webscr' : 'https://www.paypal.com/cgi-bin/webscr';
	}

 public 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>paypal_class->dump_fields() Output:</h3>";
	 echo "<table width=\"95%\" border=\"1\" cellpadding=\"2\" cellspacing=\"0\">
											 <tr>
														 <td bgcolor=\"black\"><b><font color=\"white\">Field Name</font></b></td>
														 <td bgcolor=\"black\"><b><font color=\"white\">Value</font></b></td>
											 </tr>";
	 ksort($this->fields);
	 foreach ($this->fields as $key => $value) {echo "<tr><td>$key</td><td>".urldecode($value)."&nbsp;</td></tr>";}
	 echo "</table><br>";
 }

	private function debug($msg) {
		if(!$this->ipn_debug)
			return;

		$today = date ( "Y-m-d H:i:s " );
		$fh = fopen (DEBUG_LOG_FILE, 'a' ) or die ( "Can't open debug file. Please manually create the 'debug.log' file and make it writable." );
		$ua_simple = preg_replace ( "/(.*)\s\(.*)/", "\\1", $_SERVER ['HTTP_USER_AGENT'] );
		fwrite ( $fh, $today . " [from: " . $_SERVER ['REMOTE_ADDR'] . "|$ua_simple] - " . $msg . "\n" );
		fclose ( $fh );
		chmod (DEBUG_LOG_FILE, 0600 );
	}
}
?>
	<?php

	/* PHP Paypal IPN Integration Class Demonstration File
	* 6.25.2008 - Eric Wang, http://code.google.com/p/paypal-ipn-class-php/
	*
	* 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.
	*
	* If you want submit a payment form to Paypal sandbox. Please add the
	* _GET[sandbox=1] parameter to link. ie: paypal.php?sandbox=1.
	*
	* 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.
	*/

	require_once('paypal_class.php');

	$p = new paypal_class();
	$p->sandbox = true;

	if($p->sandbox) {
	$p->admin_mail = 'notification@gmail.com';
	$p->paypal_mail = 'owner@softwarebusiness.com'; // equivilent to: $p->add_field('business', 'email@domain.com')
	} else {

	}

	// $p->admin_mail = EMAIL_ADD;
	//$p -> paypal_mail = PAYPAL_EMAIL_ADD; // If set, class will verify the receiver.

	switch ($_GET['action']) {
	default:

	// 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.

	// adds or edits a "$p->add_field(key, value);" in following, which is what will be
	// sent to paypal as POST variables. Refer to PayPal HTML Variables:
	// https://cms.paypal.com/us/cgi-bin/?cmd=_render-content&content_ID=developer/e_howto_html_Appx_websitestandard_htmlvariables

	// 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.

	// setup a current URL variable for this script

	$this_script = 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'];

	$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('cmd', '_donations');
	$p->add_field('custom', 9);
	$p->add_field('rm', '2'); // Return method = POST

	$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':
	if ($p->validate_ipn()) {
	$subject = 'Instant Payment Notification - Received Payment';
	$p->send_report($subject);
	} else {
	$subject = 'Instant Payment Notification - Payment Fail';
	$p->send_report ( $subject );
	}
	break;
	}
	?>
	<?php
	/**
	* PHP Paypal IPN Integration Class
	* 6.25.2008 - Eric Wang, http://code.google.com/p/paypal-ipn-class-php/
	*
	* This file provides neat and simple method to validate the paid result with Paypal IPN.
	* It's NOT intended to make the paypal integration "plug 'n' play".
	* It still requires the developer to understand the paypal process and know the variables
	* you want/need to pass to paypal to achieve what you want.
	*
	* @author Eric Wang <eric.wzy@gmail.com>
	* @copyright (C) 2008 - 2009 Eric.Wang
	*
	*/

	define('LOG_FILE', 'ipn_results.log');
	define('DEBUG_LOG_FILE', 'ipn_results_debug.log');

	class paypal_class {
	private $ipn_status;

	public $admin_mail; // receive the ipn status report pre transaction
	public $paypal_mail; // paypal account, if set, class need to verify receiver
	public $txn_id; // array: if the txn_id array existed, class need to verified the txn_id duplicate
	private $ipn_response; // holds the IPN response from paypal
	public $ipn_data = array(); // array contains the POST values for IPN
	private $fields = array(); // array holds the fields to submit to paypal


	public $sandbox = false;
	private $ipn_debug = false;
	public $ipn_log = true;

	function __construct() {
	$this->ipn_status = '';
	$this->admin_mail = null;
	$this->paypal_mail = null;
	$this->txn_id = null;
	$this->tax = null;
	$this->ipn_response = '';
	}

	// adds a key=>value pair to the fields array, which is what will be
	// sent to paypal as POST variables.
	public function add_field($field, $value) {
	$this->fields["$field"] = $value;
	}


	// 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.

	// The user will briefly see a message on the screen that reads:
	// "Please wait, your order is being processed..." and then immediately
	// is redirected to paypal.
	public function submit_paypal_post() {
	echo "<html>\n";
	echo "<head><title>Processing Payment...</title></head>\n";
	echo "<body onLoad=\"document.forms['paypal_form'].submit();\">\n";
	echo "<center><h2>Please wait, your order is being processed and you";
	echo " will be redirected to the paypal website.</h2></center>\n";
	echo "<form method=\"post\" name=\"paypal_form\" ";
	echo "action=\"".$this->getPaypalURL()."\">\n";

	if(isset($this->paypal_mail)) {
	echo "<input type=\"hidden\" name=\"business\" value=\"$this->paypal_mail\"/>\n";
	}

	foreach ($this->fields as $name => $value) {
	echo "<input type=\"hidden\" name=\"$name\" value=\"$value\"/>\n";
	}

	echo "<center><br/><br/>If you are not automatically redirected to ";
	echo "paypal within 5 seconds...<br/><br/>\n";
	echo "<input type=\"submit\" value=\"Click Here\"></center>\n";

	echo "</form>\n";
	echo "</body></html>\n";
	}

	public function validate_ipn() {
	$hostname = gethostbyaddr ( $_SERVER ['REMOTE_ADDR'] );
	if (! preg_match ( '/paypal\.com$/', $hostname )) {
	$this->ipn_status = 'Validation post isn\'t from PayPal';
	$this->log_ipn_results ( false );
	return false;
	}

	if (isset($this->paypal_mail) && strtolower ( $_POST['receiver_email'] ) != strtolower(trim( $this->paypal_mail ))) {
	$this->ipn_status = "Receiver Email Not Match";
	$this->log_ipn_results ( false );
	return false;
	}

	if (isset($this->txn_id) && in_array($_POST['txn_id'],$this->txn_id)) {
	$this->ipn_status = "txn_id have a duplicate";
	$this->log_ipn_results ( false );
	return false;
	}

	// parse the paypal URL
	$url_parsed = parse_url($this->getPaypalURL());

	// 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.
	$post_string = '';
	foreach ($_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
	if($this->sandbox) {
	$fp = fsockopen('ssl://www.sandbox.paypal.com', "443", $err_num, $err_str, 60 );
	} else {
	$fp = fsockopen('ssl://www.paypal.com', "443", $err_num, $err_str, 60 );
	}

	if(!$fp) {
	// could not open the connection. If loggin is on, the error message
	// will be in the log.
	$this->ipn_status = "fsockopen error no. $err_num: $err_str";
	$this->log_ipn_results(false);
	return false;
	} else {
	// Post the data back to paypal
	fputs($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);
	}

	// Invalid IPN transaction. Check the $ipn_status and log for details.
	if (stristr($this->ipn_response, "VERIFIED") === FALSE) {
	$this->ipn_status = 'IPN Validation Failed';
	$this->log_ipn_results(false);
	return false;
	} else {
	$this->ipn_status = "IPN VERIFIED";
	$this->log_ipn_results(true);
	return true;
	}
	}

	private function log_ipn_results($success) {
	$hostname = gethostbyaddr ( $_SERVER ['REMOTE_ADDR'] );
	// Timestamp
	$text = '[' . date ( 'm/d/Y g:i A' ) . '] - ';
	// Success or failure being logged?
	if ($success)
	$this->ipn_status = $text . 'SUCCESS:' . $this->ipn_status . "!\n";
	else
	$this->ipn_status = $text . 'FAIL: ' . $this->ipn_status . "!\n";
	// Log the POST variables
	$this->ipn_status .= "[From:" . $hostname . "\|" . $_SERVER ['REMOTE_ADDR'] . "]IPN POST Vars Received By Paypal_IPN Response API:\n";
	foreach ( $this->ipn_data as $key => $value ) {
	$this->ipn_status .= "$key=$value \n";
	}
	// Log the response from the paypal server
	$this->ipn_status .= "IPN Response from Paypal Server:\n" . $this->ipn_response;
	$this->write_to_log();
	}

	private function write_to_log() {
	if (! $this->ipn_log)
	return; // is logging turned off?

	$fp = fopen ( LOG_FILE , 'a' );
	fwrite ( $fp, $this->ipn_status . "\n\n" );
	fclose ( $fp ); // close file
	chmod ( LOG_FILE , 0600 );
	}

	public function send_report($subject) {
	$body .= "from " . $this->ipn_data ['payer_email'] . " on " . date ( 'm/d/Y' );
	$body .= " at " . date ( 'g:i A' ) . "\n\nDetails:\n" . $this->ipn_status;
	mail ( $this->admin_mail, $subject, $body );
	}

	public function print_report() {
	$find [] = "\n";
	$replace [] = '<br/>';
	$html_content = str_replace ( $find, $replace, $this->ipn_status );
	echo $html_content;
	}

	public function getPaypalURL() {
	return $this->sandbox ? 'https://www.sandbox.paypal.com/cgi-bin/webscr' : 'https://www.paypal.com/cgi-bin/webscr';
	}

	public 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>paypal_class->dump_fields() Output:</h3>";
	echo "<table width=\"95%\" border=\"1\" cellpadding=\"2\" cellspacing=\"0\">
	<tr>
	<td bgcolor=\"black\"><b><font color=\"white\">Field Name</font></b></td>
	<td bgcolor=\"black\"><b><font color=\"white\">Value</font></b></td>
	</tr>";
	ksort($this->fields);
	foreach ($this->fields as $key => $value) {echo "<tr><td>$key</td><td>".urldecode($value)." </td></tr>";}
	echo "</table><br>";
	}

	private function debug($msg) {
	if(!$this->ipn_debug)
	return;

	$today = date ( "Y-m-d H:i:s " );
	$fh = fopen (DEBUG_LOG_FILE, 'a' ) or die ( "Can't open debug file. Please manually create the 'debug.log' file and make it writable." );
	$ua_simple = preg_replace ( "/(.)\s\(.)/", "\\1", $_SERVER ['HTTP_USER_AGENT'] );
	fwrite ( $fh, $today . " [from: " . $_SERVER ['REMOTE_ADDR'] . "\|$ua_simple] - " . $msg . "\n" );
	fclose ( $fh );
	chmod (DEBUG_LOG_FILE, 0600 );
	}
	}
	?>