//

//

// A la fin d'un achat d’un produit, cette URL de notification est appelée

//

// inspirée de http://www.johnboy.com/blog/http-11-paypal-ipn-example-php-code



//______________

// SANDOX ???   |

//______________|

// true or false

// sandbox = true permet de tester en mode argent virtuel (faut s'inscrire sur paypal develloper pour créer un compte marchant et un compte acheteur virtuel)

// sanbox  = false en mode paiement réel)

//

$sandbox = true;

$debug   = '';



if($sandbox === true) { $url_paypal = 'www.sandbox.paypal.com'; }

else                  { $url_paypal = 'www.paypal.com';         }





//________________________________________________

//read the post from PayPal system and add 'cmd'  |

//________________________________________________|



$req = 'cmd=_notify-validate';



foreach ($_POST as $key => $value)

 {

	$value = urlencode(stripslashes($value));

	$req .= "&$key=$value";

}



//_________________________________________________________________

//post back to PayPal system to validate (replaces old headers)    |

//_________________________________________________________________|



$header  = "POST /cgi-bin/webscr HTTP/1.1\r\n";

$header .= "Content-Type: application/x-www-form-urlencoded\r\n";

$header .= "Host: " . $url_paypal . "\r\n";

$header .= "Connection: close\r\n";

$header .= "Content-Length: " . strlen($req) . "\r\n\r\n";

$fp = fsockopen ('ssl://' . $url_paypal, 443, $errno, $errstr, 30);



//_____________________________

//error connecting to paypal   |

//_____________________________|



if (!$fp)

{

	$debug .= 'fsockopen error : ' . "\r\n\r\n";

}



//_________________________

//successful connection    |

//_________________________|



if ($fp)

{

	fputs ($fp, $header . $req);

	

	while (!feof($fp))

	{

		$res = fgets ($fp, 1024);

		$res = trim($res); //NEW & IMPORTANT (je sais pas pourquoi mais peut importe...)

		

		if (strcmp($res, "VERIFIED") == 0)

		{

		//_________________

		// ALL IS OK !!!   |

		//_________________|

			//insert order into database    

			$debug .= 'VERIFIED';

		}

		

		if (strcmp ($res, "INVALID") == 0)

		{

		//_______________________

		// INVALID TRANSACTION   |

		//_______________________|

			//insert into DB in a table for bad payments for you to process later

			$debug .= 'INVALID';

		}

	}

	fclose($fp);

}





//_________________________

// DEBUG                   |

//_________________________|

$uniqid = uniqid();

$date = date ( 'Y-m-d_@_H-i-s', time());

$directory = '/var/www/paypal_log/' . CONF_NOM_DU_MONDE;

if (file_exists($directory)) 

{

	file_put_contents($directory . '/sandbox_' . $date . '___' . $uniqid . '.txt' , $debug) ;

}