PayPalでは公式のサンプルコードが手に入り，それを使うことでExpressCheckoutという一番簡単な決済方法を使うことができる．
だがPayPalにはもう一つの支払い方法として定期支払い(Recurring)が存在する．
今回はそのメモ．
ちなみに，今回使うpaypalfunctions.phpファイルはここで手に入る．
定期支払い関数を作る
paypalfunctions.phpを編集して，以下のコードを追加する．
function CallRecurringExpressCheckout( $billingDescription, $currencyCodeType, $paymentType, $returnURL,
$cancelURL)
{
//------------------------------------------------------------------------------------------------------------------------------------
// Construct the parameter string that describes the SetExpressCheckout API call in the shortcut implementation
$nvpstr="&L_BILLINGTYPE0=RecurringPayments";
$nvpstr = $nvpstr . "&L_BILLINGAGREEMENTDESCRIPTION0=" . $billingDescription;
$nvpstr = $nvpstr . "&RETURNURL=" . $returnURL;
$nvpstr = $nvpstr . "&CANCELURL=" . $cancelURL;
$_SESSION["currencyCodeType"] = $currencyCodeType;
$_SESSION["PaymentType"] = $paymentType;
//'---------------------------------------------------------------------------------------------------------------
//' Make the API call to PayPal
//' If the API call succeded, then redirect the buyer to PayPal to begin to authorize payment.
//' If an error occured, show the resulting errors
//'---------------------------------------------------------------------------------------------------------------
$resArray=hash_call("SetExpressCheckout", $nvpstr);
$ack = strtoupper($resArray["ACK"]);
if($ack=="SUCCESS" || $ack=="SUCCESSWITHWARNING")
{
$token = urldecode($resArray["TOKEN"]);
$_SESSION['TOKEN']=$token;
}
return $resArray;
}
function CreateRecurringPaymentsProfile($fromDate, $description, $amount, $currencyCodeType, $period, $frequency, $token) {
$nvpstr="&PROFILESTARTDATE=" . $fromDate;
$nvpstr = $nvpstr . "&CURRENCYCODE=" . $currencyCodeType;
$nvpstr = $nvpstr . "&AMT=" . $amount;
$nvpstr = $nvpstr . "&DESC=" . $description;
$nvpstr = $nvpstr . "&BILLINGPERIOD=" . $period;
$nvpstr = $nvpstr . "&CURRENCYCODE=" . $currencyCode;
$nvpstr = $nvpstr . "&BILLINGFREQUENCY=" . $frequency;
$nvpstr = $nvpstr . "&TOKEN=" . $token;
$_SESSION["currencyCodeType"] = $currencyCodeType;
$_SESSION["PaymentType"] = $paymentType;
//'---------------------------------------------------------------------------------------------------------------
//' Make the API call to PayPal
//' If the API call succeded, then redirect the buyer to PayPal to begin to authorize payment.
//' If an error occured, show the resulting errors
//'---------------------------------------------------------------------------------------------------------------
$resArray=hash_call("CreateRecurringPaymentsProfile", $nvpstr);
$ack = strtoupper($resArray["ACK"]);
if($ack=="SUCCESS" || $ack=="SUCCESSWITHWARNING")
{
$token = urldecode($resArray["TOKEN"]);
$_SESSION['TOKEN']=$token;
}
return $resArray;
}
そして，この関数を呼び出すPHPファイルは以下のように記述する．
$planAmount = 3980;
$planDescription = "定期支払い(毎月) ".$planAmount."円";
$returnURL = "http://localhost/review.php";
$cancelURL = "http://localhost/";
// 後で使う
$_SESSION["desc"] = $planDescription;
$_SESSION["amount"] = $planAmount;
$resArray = CallRecurringExpressCheckout ($planDescription, $currencyCodeType, $paymentType, $returnURL, $cancelURL);
$ack = strtoupper($resArray["ACK"]);
if($ack=="SUCCESS" || $ack=="SUCCESSWITHWARNING")
{
$token = urldecode($resArray["TOKEN"]);
$_SESSION['reshash']=$token;
RedirectToPayPal ( $token );
}
else
{
//Display a user friendly Error on the page using any of the following error information returned by PayPal
$ErrorCode = urldecode($resArray["L_ERRORCODE0"]);
$ErrorShortMsg = urldecode($resArray["L_SHORTMESSAGE0"]);
$ErrorLongMsg = urldecode($resArray["L_LONGMESSAGE0"]);
$ErrorSeverityCode = urldecode($resArray["L_SEVERITYCODE0"]);
if ($ini["debug"]) {
echo "SetExpressCheckout API call failed. ";
echo "Detailed Error Message: " . $ErrorLongMsg;
echo "Short Error Message: " . $ErrorShortMsg;
echo "Error Code: " . $ErrorCode;
echo "Error Severity Code: " . $ErrorSeverityCode;
}
}
ちなみにこの段階では定期支払いの期間，料金の設定などは要らないらしい．
そして，GetShipmentDetail関数を呼び出すreview.phpを作成し，
その後，定期支払いを確定する以下のPHPスクリプトを作成する．
(POSTでreview.phpからGetShipmentDetailで取得したTOKENを受け取ってる前提)
$currencyCodeType = "JPY";
$resArray = CreateRecurringPaymentsProfile((new DateTime())->format("c"), $_SESSION["desc"], $_SESSION["amount"], $currencyCodeType, "Month", 1, $_POST["token"]); // 一ヶ月の定期支払い
$ack = strtoupper($resArray["ACK"]);
if ($ack == "SUCCESS" || $ack == "SUCCESSWITHWARNING") {
info("支払いに成功しました．");
} else {
fatal("支払いに失敗しました．", var_dump($resArray));
}
