森林海
看看 Dotplant2，它在后端使用 Yii2 和货币转换表。特别是这些文件。components/payment/ PaypalPayment.php 和 2. 他们的CurrencyHelper.php，位于 modules/shop/helpers。下面是一些代码片段。贝宝支付public function content() { /** @var Order $order */ $order = $this->order; $order->calculate(); $payer = (new Payer())->setPaymentMethod('paypal'); $priceSubTotal = 0; /** @var ItemList $itemList */ $itemList = array_reduce($order->items, function($result, $item) use (&$priceSubTotal) { /** @var OrderItem $item */ /** @var Product $product */ $product = $item->product; $price = CurrencyHelper::convertFromMainCurrency($item->price_per_pcs, $this->currency); $priceSubTotal = $priceSubTotal + ($price * $item->quantity); /** @var ItemList $result */ return $result->addItem( (new Item()) ->setName($product->name) ->setCurrency($this->currency->iso_code) ->setPrice($price) ->setQuantity($item->quantity) ->setUrl(Url::toRoute([ '@product', 'model' => $product, 'category_group_id' => $product->category->category_group_id ], true)) ); }, new ItemList()); $priceTotal = CurrencyHelper::convertFromMainCurrency($order->total_price, $this->currency); $details = (new Details()) ->setShipping($priceTotal - $priceSubTotal) ->setSubtotal($priceSubTotal) ->setTax(0); $amount = (new Amount()) ->setCurrency($this->currency->iso_code) ->setTotal($priceTotal) ->setDetails($details); $transaction = (new Transaction()) ->setAmount($amount) ->setItemList($itemList) ->setDescription($this->transactionDescription) ->setInvoiceNumber($this->transaction->id); $urls = (new RedirectUrls()) ->setReturnUrl($this->createResultUrl(['id' => $this->order->payment_type_id])) ->setCancelUrl($this->createFailUrl()); $payment = (new Payment()) ->setIntent('sale') ->setPayer($payer) ->setTransactions([$transaction]) ->setRedirectUrls($urls); $link = null; try { $link = $payment->create($this->apiContext)->getApprovalLink(); } catch (\Exception $e) { $link = null; } return $this->render('paypal', [ 'order' => $order, 'transaction' => $this->transaction, 'approvalLink' => $link, ]); }货币助手<?phpnamespace app\modules\shop\helpers;use app\modules\shop\models\Currency;use app\modules\shop\models\UserPreferences;class CurrencyHelper{ /** * @var Currency $userCurrency * @var Currency $mainCurrency */ static protected $userCurrency = null; static protected $mainCurrency = null; /** * @return Currency */ static public function getUserCurrency() { if (null === static::$userCurrency) { static::$userCurrency = static::findCurrencyByIso(UserPreferences::preferences()->userCurrency); } return static::$userCurrency; } /** * @param Currency $userCurrency * @return Currency */ static public function setUserCurrency(Currency $userCurrency) { return static::$userCurrency = $userCurrency; } /** * @return Currency */ static public function getMainCurrency() { return null === static::$mainCurrency ? static::$mainCurrency = Currency::getMainCurrency() : static::$mainCurrency; } /** * @param string $code * @param bool|true $useMainCurrency * @return Currency */ static public function findCurrencyByIso($code) { $currency = Currency::find()->where(['iso_code' => $code])->one(); $currency = null === $currency ? static::getMainCurrency() : $currency; return $currency; } /** * @param float|int $input * @param Currency $from * @param Currency $to * @return float|int */ static public function convertCurrencies($input = 0, Currency $from, Currency $to) { if (0 === $input) { return $input; } if ($from->id !== $to->id) { $main = static::getMainCurrency(); if ($main->id === $from->id && $main->id !== $to->id) { $input = $input / $to->convert_rate * $to->convert_nominal; } elseif ($main->id !== $from->id && $main->id === $to->id) { $input = $input / $from->convert_nominal * $from->convert_rate; } else { $input = $input / $from->convert_nominal * $from->convert_rate; $input = $input / $to->convert_rate * $to->convert_nominal; } } return $to->formatWithoutFormatString($input); } /** * @param float|int $input * @param Currency $from * @return float|int */ static public function convertToUserCurrency($input = 0, Currency $from) { return static::convertCurrencies($input, $from, static::getUserCurrency()); } /** * @param float|int $input * @param Currency $from * @return float|int */ static public function convertToMainCurrency($input = 0, Currency $from) { return static::convertCurrencies($input, $from, static::getMainCurrency()); } /** * @param float|int $input * @param Currency $to * @return float|int */ static public function convertFromMainCurrency($input = 0, Currency $to) { return static::convertCurrencies($input, static::getMainCurrency(), $to); } /** * @param Currency $currency * @param string|null $locale * @return string */ static public function getCurrencySymbol(Currency $currency, $locale = null) { $locale = null === $locale ? \Yii::$app->language : $locale; $result = ''; try { $fake = $locale . '@currency=' . $currency->iso_code; $fmt = new \NumberFormatter($fake, \NumberFormatter::CURRENCY); $result = $fmt->getSymbol(\NumberFormatter::CURRENCY_SYMBOL); } catch (\Exception $e) { $result = preg_replace('%[\d\s,]%i', '', $currency->format(0)); } return $result; }}