PHP WC_Subscriptions_Order::get_subscription_trial_length方法代码示例

 /**
  * Takes a subscription key and calculates the date on which the subscription is scheduled to expire
  * or 0 if it will never expire.
  *
  * @param $subscription_key string A subscription key of the form created by @see self::get_subscription_key()
  * @param $user_id int The ID of the user who owns the subscriptions. Although this parameter is optional, if you have the User ID you should pass it to improve performance.
  * @param $type string (optional) The format for the Either 'mysql' or 'timestamp'.
  * @since 1.1
  */
 public static function calculate_trial_expiration_date($subscription_key, $user_id = '', $type = 'mysql')
 {
     $subscription = self::get_subscription($subscription_key, $user_id);
     if (empty($subscription)) {
         $expiration_date = 0;
     } else {
         $order = new WC_Order($subscription['order_id']);
         $subscription_trial_length = WC_Subscriptions_Order::get_subscription_trial_length($order, $subscription['product_id']);
         $subscription_trial_period = WC_Subscriptions_Order::get_subscription_trial_period($order, $subscription['product_id']);
         if ($subscription_trial_length > 0) {
             if (isset($subscription['start_date']) && !empty($subscription['start_date'])) {
                 $start_date = $subscription['start_date'];
             } elseif (!empty($order->order_date)) {
                 $start_date = get_gmt_from_date($order->order_date);
             } else {
                 $start_date = gmdate('Y-m-d H:i:s');
             }
             if ('month' == $subscription_trial_period) {
                 $expiration_date = WC_Subscriptions::add_months(strtotime($start_date), $subscription_trial_length);
             } else {
                 // Safe to just add the billing periods
                 $expiration_date = strtotime("+ {$subscription_trial_length} {$subscription_trial_period}", strtotime($start_date));
             }
         } else {
             $expiration_date = 0;
         }
     }
     $expiration_date = 'mysql' == $type && 0 != $expiration_date ? date('Y-m-d H:i:s', $expiration_date) : $expiration_date;
     return apply_filters('woocommerce_subscription_calculated_trial_expiration_date', $expiration_date, $subscription_key, $user_id);
 }

 /**
  * Filters WC_Subscriptions_Order::get_sign_up_fee() to make sure the sign-up fee for a subscription product
  * that is synchronised is returned correctly.
  *
  * @param float The initial sign-up fee charged when the subscription product in the order was first purchased, if any.
  * @param mixed $order A WC_Order object or the ID of the order which the subscription was purchased in.
  * @param int $product_id The post ID of the subscription WC_Product object purchased in the order. Defaults to the ID of the first product purchased in the order.
  * @return float The initial sign-up fee charged when the subscription product in the order was first purchased, if any.
  * @since 1.5.3
  */
 public static function get_sign_up_fee($sign_up_fee, $order, $product_id, $non_subscription_total)
 {
     if (self::order_contains_synced_subscription($order->id) && WC_Subscriptions_Order::get_subscription_trial_length($order) < 1) {
         $sign_up_fee = max(WC_Subscriptions_Order::get_total_initial_payment($order) - $non_subscription_total, 0);
     }
     return $sign_up_fee;
 }

 /**
  * Takes a subscription key and calculates the date on which the subscription is scheduled to expire 
  * or 0 if it will never expire.
  *
  * @param $subscription_key string A subscription key of the form created by @see self::get_subscription_key()
  * @param $user_id int The ID of the user who owns the subscriptions. Although this parameter is optional, if you have the User ID you should pass it to improve performance.
  * @param $type string (optional) The format for the Either 'mysql' or 'timestamp'.
  * @since 1.1
  */
 public static function calculate_subscription_expiration_date($subscription_key, $user_id = '', $type = 'mysql')
 {
     $subscription = self::get_subscription($subscription_key, $user_id);
     if (empty($subscription)) {
         $expiration_date = 0;
     } else {
         $order = new WC_Order($subscription['order_id']);
         $subscription_period = WC_Subscriptions_Order::get_subscription_period($order, $subscription['product_id']);
         $subscription_length = WC_Subscriptions_Order::get_subscription_length($order, $subscription['product_id']);
         $subscription_interval = WC_Subscriptions_Order::get_subscription_interval($order, $subscription['product_id']);
         $subscription_trial_length = WC_Subscriptions_Order::get_subscription_trial_length($order, $subscription['product_id']);
         $subscription_trial_period = WC_Subscriptions_Order::get_subscription_trial_period($order, $subscription['product_id']);
         if ($subscription_length > 0) {
             if (isset($subscription['start_date']) && !empty($subscription['start_date'])) {
                 $start_date = $subscription['start_date'];
             } elseif (!empty($order->order_date)) {
                 $start_date = $order->order_date - get_option('gmt_offset') * 3600;
             } else {
                 date('Y-m-d H:i:s');
             }
             $expiration_date = strtotime("+ {$subscription_trial_length} {$subscription_trial_period}s", strtotime($start_date));
             $expiration_date = strtotime("+ {$subscription_length} {$subscription_period}s", $expiration_date);
         } else {
             $expiration_date = 0;
         }
     }
     $expiration_date = 'mysql' == $type && 0 != $expiration_date ? date('Y-m-d H:i:s', $expiration_date) : $expiration_date;
     return apply_filters('woocommerce_subscription_calculated_expiration_date', $expiration_date, $subscription_key, $user_id);
 }

 /**
  * Override the default PayPal standard args in WooCommerce for subscription purchases.
  *
  * Based on the HTML Variables documented here: https://developer.paypal.com/webapps/developer/docs/classic/paypal-payments-standard/integration-guide/Appx_websitestandard_htmlvariables/#id08A6HI00JQU
  *
  * @since 1.0
  */
 public static function paypal_standard_subscription_args($paypal_args)
 {
     extract(self::get_order_id_and_key($paypal_args));
     if (WC_Subscriptions_Order::order_contains_subscription($order_id) && 'yes' !== get_option(WC_Subscriptions_Admin::$option_prefix . '_turn_off_automatic_payments', 'no')) {
         $order = new WC_Order($order_id);
         $order_items = $order->get_items();
         // Only one subscription allowed in the cart when PayPal Standard is active
         $product = $order->get_product_from_item(array_pop($order_items));
         // It's a subscription
         $paypal_args['cmd'] = '_xclick-subscriptions';
         if (count($order->get_items()) > 1) {
             foreach ($order->get_items() as $item) {
                 if ($item['qty'] > 1) {
                     $item_names[] = $item['qty'] . ' x ' . $item['name'];
                 } else {
                     if ($item['qty'] > 0) {
                         $item_names[] = $item['name'];
                     }
                 }
             }
             $paypal_args['item_name'] = sprintf(__('Order %s', WC_Subscriptions::$text_domain), $order->get_order_number());
         } else {
             $paypal_args['item_name'] = $product->get_title();
         }
         $unconverted_periods = array('billing_period' => WC_Subscriptions_Order::get_subscription_period($order), 'trial_period' => WC_Subscriptions_Order::get_subscription_trial_period($order));
         $converted_periods = array();
         // Convert period strings into PayPay's format
         foreach ($unconverted_periods as $key => $period) {
             switch (strtolower($period)) {
                 case 'day':
                     $converted_periods[$key] = 'D';
                     break;
                 case 'week':
                     $converted_periods[$key] = 'W';
                     break;
                 case 'year':
                     $converted_periods[$key] = 'Y';
                     break;
                 case 'month':
                 default:
                     $converted_periods[$key] = 'M';
                     break;
             }
         }
         $price_per_period = WC_Subscriptions_Order::get_recurring_total($order);
         $subscription_interval = WC_Subscriptions_Order::get_subscription_interval($order);
         $subscription_length = WC_Subscriptions_Order::get_subscription_length($order);
         $subscription_installments = $subscription_length / $subscription_interval;
         $is_payment_change = WC_Subscriptions_Change_Payment_Gateway::$is_request_to_change_payment;
         $is_switch_order = WC_Subscriptions_Switcher::order_contains_subscription_switch($order->id);
         $sign_up_fee = $is_payment_change ? 0 : WC_Subscriptions_Order::get_sign_up_fee($order);
         $initial_payment = $is_payment_change ? 0 : WC_Subscriptions_Order::get_total_initial_payment($order);
         if ($is_payment_change) {
             // Add a nonce to the order ID to avoid "This invoice has already been paid" error when changing payment method to PayPal when it was previously PayPal
             $paypal_args['invoice'] = $paypal_args['invoice'] . '-wcscpm-' . wp_create_nonce();
             // Set a flag on the order if changing from PayPal *to* PayPal to prevent incorrectly cancelling the subscription
             if ('paypal' == $order->recurring_payment_method) {
                 add_post_meta($order_id, '_wcs_changing_payment_from_paypal_to_paypal', 'true', true);
             }
         }
         // If we're changing the payment date or switching subs, we need to set the trial period to the next payment date & installments to be the number of installments left
         if ($is_payment_change || $is_switch_order) {
             $subscription_key = WC_Subscriptions_Manager::get_subscription_key($order_id, $product->id);
             // Give a free trial until the next payment date
             $next_payment_timestamp = WC_Subscriptions_Manager::get_next_payment_date($subscription_key, $order->user_id, 'timestamp');
             // When the subscription is on hold
             if ($next_payment_timestamp != false) {
                 $trial_until = self::calculate_trial_periods_until($next_payment_timestamp);
                 $subscription_trial_length = $trial_until['first_trial_length'];
                 $converted_periods['trial_period'] = $trial_until['first_trial_period'];
                 $second_trial_length = $trial_until['second_trial_length'];
                 $second_trial_period = $trial_until['second_trial_period'];
             }
             // If is a payment change, we need to account for completed payments on the number of installments owing
             if ($is_payment_change && $subscription_length > 0) {
                 $subscription_installments -= WC_Subscriptions_Manager::get_subscriptions_completed_payment_count($subscription_key);
             }
         } else {
             $subscription_trial_length = WC_Subscriptions_Order::get_subscription_trial_length($order);
         }
         if ($subscription_trial_length > 0) {
             // Specify a free trial period
             if ($is_switch_order) {
                 $paypal_args['a1'] = $initial_payment > 0 ? $initial_payment : 0;
             } else {
                 $paypal_args['a1'] = $sign_up_fee > 0 ? $sign_up_fee : 0;
             }
             // Maybe add the sign up fee to the free trial period
             // Trial period length
             $paypal_args['p1'] = $subscription_trial_length;
             // Trial period
             $paypal_args['t1'] = $converted_periods['trial_period'];
             // We need to use a second trial period before we have more than 90 days until the next payment
//.........这里部分代码省略.........

 /**
  * Filters WC_Subscriptions_Order::get_sign_up_fee() to make sure the sign-up fee for a subscription product
  * that is synchronised is returned correctly.
  *
  * @param float The initial sign-up fee charged when the subscription product in the order was first purchased, if any.
  * @param mixed $order A WC_Order object or the ID of the order which the subscription was purchased in.
  * @param int $product_id The post ID of the subscription WC_Product object purchased in the order. Defaults to the ID of the first product purchased in the order.
  * @return float The initial sign-up fee charged when the subscription product in the order was first purchased, if any.
  * @since 1.5.3
  * @deprecated 2.0
  */
 public static function get_sign_up_fee($sign_up_fee, $order, $product_id, $non_subscription_total)
 {
     _deprecated_function(__METHOD__, '2.0', __CLASS__ . '::get_synced_sign_up_fee');
     if ('shop_order' == get_post_type($order) && self::order_contains_synced_subscription($order->id) && WC_Subscriptions_Order::get_subscription_trial_length($order) < 1) {
         $sign_up_fee = max(WC_Subscriptions_Order::get_total_initial_payment($order) - $non_subscription_total, 0);
     }
     return $sign_up_fee;
 }

 /**
  * Calculate the timestamp for the next payment
  *
  * @param WC_Order  $order
  * @param int       $product_id
  *
  * @return mixed|void
  */
 private static function calculate_next_payment_timestamp($order, $product_id)
 {
     $type = 'timestamp';
     $from_date = '';
     $from_date_arg = $from_date;
     $subscription = WC_Subscriptions_Manager::get_subscription(WC_Subscriptions_Manager::get_subscription_key($order->id, $product_id));
     $subscription_period = WC_Subscriptions_Order::get_subscription_period($order, $product_id);
     $subscription_interval = WC_Subscriptions_Order::get_subscription_interval($order, $product_id);
     $subscription_trial_length = WC_Subscriptions_Order::get_subscription_trial_length($order, $product_id);
     $subscription_trial_period = WC_Subscriptions_Order::get_subscription_trial_period($order, $product_id);
     $trial_end_time = !empty($subscription['trial_expiry_date']) ? $subscription['trial_expiry_date'] : WC_Subscriptions_Product::get_trial_expiration_date($product_id, get_gmt_from_date($order->order_date));
     $trial_end_time = strtotime($trial_end_time);
     // If the subscription has a free trial period, and we're still in the free trial period, the next payment is due at the end of the free trial
     if ($subscription_trial_length > 0 && $trial_end_time > gmdate('U') + 60 * 60 * 23 + 120) {
         // Make sure trial expiry is more than 23+ hours in the future to account for trial expiration dates incorrectly stored in non-UTC/GMT timezone (and also for any potential changes to the site's timezone)
         $next_payment_timestamp = $trial_end_time;
         // The next payment date is {interval} billing periods from the from date
     } else {
         // We have a timestamp
         if (!empty($from_date) && is_numeric($from_date)) {
             $from_date = date('Y-m-d H:i:s', $from_date);
         }
         if (empty($from_date)) {
             if (!empty($subscription['completed_payments'])) {
                 $from_date = array_pop($subscription['completed_payments']);
                 $add_failed_payments = true;
             } else {
                 if (!empty($subscription['start_date'])) {
                     $from_date = $subscription['start_date'];
                     $add_failed_payments = true;
                 } else {
                     $from_date = gmdate('Y-m-d H:i:s');
                     $add_failed_payments = false;
                 }
             }
             $failed_payment_count = WC_Subscriptions_Order::get_failed_payment_count($order, $product_id);
             // Maybe take into account any failed payments
             if (true === $add_failed_payments && $failed_payment_count > 0) {
                 $failed_payment_periods = $failed_payment_count * $subscription_interval;
                 $from_timestamp = strtotime($from_date);
                 if ('month' == $subscription_period) {
                     $from_date = date('Y-m-d H:i:s', WC_Subscriptions::add_months($from_timestamp, $failed_payment_periods));
                 } else {
                     // Safe to just add the billing periods
                     $from_date = date('Y-m-d H:i:s', strtotime("+ {$failed_payment_periods} {$subscription_period}", $from_timestamp));
                 }
             }
         }
         $from_timestamp = strtotime($from_date);
         if ('month' == $subscription_period) {
             // Workaround potential PHP issue
             $next_payment_timestamp = WC_Subscriptions::add_months($from_timestamp, $subscription_interval);
         } else {
             $next_payment_timestamp = strtotime("+ {$subscription_interval} {$subscription_period}", $from_timestamp);
         }
         // Make sure the next payment is in the future
         $i = 1;
         while ($next_payment_timestamp < gmdate('U') && $i < 30) {
             if ('month' == $subscription_period) {
                 $next_payment_timestamp = WC_Subscriptions::add_months($next_payment_timestamp, $subscription_interval);
             } else {
                 // Safe to just add the billing periods
                 $next_payment_timestamp = strtotime("+ {$subscription_interval} {$subscription_period}", $next_payment_timestamp);
             }
             $i = $i + 1;
         }
     }
     // If the subscription has an expiry date and the next billing period comes after the expiration, return 0
     if (isset($subscription['expiry_date']) && 0 != $subscription['expiry_date'] && $next_payment_timestamp + 120 > strtotime($subscription['expiry_date'])) {
         $next_payment_timestamp = 0;
     }
     $next_payment = 'mysql' == $type && 0 != $next_payment_timestamp ? date('Y-m-d H:i:s', $next_payment_timestamp) : $next_payment_timestamp;
     return apply_filters('woocommerce_subscriptions_calculated_next_payment_date', $next_payment, $order, $product_id, $type, $from_date, $from_date_arg);
 }

//.........这里部分代码省略.........
             // Set the invoice details to the original order's invoice but also append a special string and this renewal orders ID so that we can match it up as a failed renewal order payment later
             $paypal_args['invoice'] = self::$invoice_prefix . ltrim($order->get_order_number(), '#') . '-wcsfrp-' . $renewal_order->id;
             $paypal_args['custom'] = serialize(array($order->id, $order->order_key));
         }
         if ($order_contains_failed_renewal) {
             $sign_up_fee = 0;
             $initial_payment = $renewal_order->get_total();
             // Initial payment can be left in case the customer is purchased other products with the payment
             $subscription_trial_length = 0;
             $subscription_installments = max($subscription_installments - WC_Subscriptions_Manager::get_subscriptions_completed_payment_count(WC_Subscriptions_Manager::get_subscription_key($order_id, $product->id)), 0);
             // If we're changing the payment date or switching subs, we need to set the trial period to the next payment date & installments to be the number of installments left
         } elseif ($is_payment_change || $is_switch_order || $is_synced_subscription) {
             $subscription_key = WC_Subscriptions_Manager::get_subscription_key($order_id, $product->id);
             // Give a free trial until the next payment date
             if ($is_switch_order) {
                 $next_payment_timestamp = get_post_meta($order->id, '_switched_subscription_first_payment_timestamp', true);
             } elseif ($is_synced_subscription) {
                 $next_payment_timestamp = WC_Subscriptions_Synchroniser::calculate_first_payment_date($product, 'timestamp');
             } else {
                 $next_payment_timestamp = WC_Subscriptions_Manager::get_next_payment_date($subscription_key, $order->user_id, 'timestamp');
             }
             // When the subscription is on hold
             if ($next_payment_timestamp != false && !empty($next_payment_timestamp)) {
                 $trial_until = self::calculate_trial_periods_until($next_payment_timestamp);
                 $subscription_trial_length = $trial_until['first_trial_length'];
                 $converted_periods['trial_period'] = $trial_until['first_trial_period'];
                 $second_trial_length = $trial_until['second_trial_length'];
                 $second_trial_period = $trial_until['second_trial_period'];
             } else {
                 $subscription_trial_length = 0;
             }
             // If is a payment change, we need to account for completed payments on the number of installments owing
             if ($is_payment_change && $subscription_length > 0) {
                 $subscription_installments -= WC_Subscriptions_Manager::get_subscriptions_completed_payment_count($subscription_key);
             }
         } else {
             $subscription_trial_length = WC_Subscriptions_Order::get_subscription_trial_length($order);
         }
         if ($subscription_trial_length > 0) {
             // Specify a free trial period
             if ($is_switch_order || $is_synced_subscription || $initial_payment != $sign_up_fee) {
                 $paypal_args['a1'] = $initial_payment > 0 ? $initial_payment : 0;
             } else {
                 $paypal_args['a1'] = $sign_up_fee > 0 ? $sign_up_fee : 0;
                 // Maybe add the sign up fee to the free trial period
             }
             // Trial period length
             $paypal_args['p1'] = $subscription_trial_length;
             // Trial period
             $paypal_args['t1'] = $converted_periods['trial_period'];
             // We need to use a second trial period before we have more than 90 days until the next payment
             if (isset($second_trial_length) && $second_trial_length > 0) {
                 $paypal_args['a2'] = 0.01;
                 // Alas, although it's undocumented, PayPal appears to require a non-zero value in order to allow a second trial period
                 $paypal_args['p2'] = $second_trial_length;
                 $paypal_args['t2'] = $second_trial_period;
             }
         } elseif ($sign_up_fee > 0 || $initial_payment != $price_per_period) {
             // No trial period, so charge sign up fee and per period price for the first period
             if ($subscription_installments == 1) {
                 $param_number = 3;
             } else {
                 $param_number = 1;
             }
             $paypal_args['a' . $param_number] = $initial_payment;
             // Sign Up interval
             $paypal_args['p' . $param_number] = $subscription_interval;
             // Sign Up unit of duration
             $paypal_args['t' . $param_number] = $converted_periods['billing_period'];
         }
         // We have a recurring payment
         if (!isset($param_number) || $param_number == 1) {
             // Subscription price
             $paypal_args['a3'] = $price_per_period;
             // Subscription duration
             $paypal_args['p3'] = $subscription_interval;
             // Subscription period
             $paypal_args['t3'] = $converted_periods['billing_period'];
         }
         // Recurring payments
         if ($subscription_installments == 1 || $sign_up_fee > 0 && $subscription_trial_length == 0 && $subscription_installments == 2) {
             // Non-recurring payments
             $paypal_args['src'] = 0;
         } else {
             $paypal_args['src'] = 1;
             if ($subscription_installments > 0) {
                 if ($sign_up_fee > 0 && $subscription_trial_length == 0) {
                     // An initial period is being used to charge a sign-up fee
                     $subscription_installments--;
                 }
                 $paypal_args['srt'] = $subscription_installments;
             }
         }
         // Don't reattempt failed payments, instead let Subscriptions handle the failed payment
         $paypal_args['sra'] = 0;
         // Force return URL so that order description & instructions display
         $paypal_args['rm'] = 2;
     }
     return $paypal_args;
 }

 /**
  * Override the default PayPal standard args in WooCommerce for subscription purchases.
  *
  * @since 1.0
  */
 public static function paypal_standard_subscription_args($paypal_args)
 {
     extract(self::get_order_id_and_key($paypal_args));
     if (WC_Subscriptions_Order::order_contains_subscription($order_id)) {
         $order = new WC_Order($order_id);
         $order_items = $order->get_items();
         // Only one subscription allowed in the cart when PayPal Standard is active
         $product = $order->get_product_from_item($order_items[0]);
         // It's a subscription
         $paypal_args['cmd'] = '_xclick-subscriptions';
         if (count($order->get_items()) > 1) {
             foreach ($order->get_items() as $item) {
                 if ($item['qty'] > 1) {
                     $item_names[] = $item['qty'] . ' x ' . $item['name'];
                 } else {
                     if ($item['qty'] > 0) {
                         $item_names[] = $item['name'];
                     }
                 }
             }
             $paypal_args['item_name'] = sprintf(__('Order %s', WC_Subscriptions::$text_domain), $order->get_order_number());
         } else {
             $paypal_args['item_name'] = $product->get_title();
         }
         // Subscription unit of duration
         switch (strtolower(WC_Subscriptions_Order::get_subscription_period($order))) {
             case 'day':
                 $subscription_period = 'D';
                 break;
             case 'week':
                 $subscription_period = 'W';
                 break;
             case 'year':
                 $subscription_period = 'Y';
                 break;
             case 'month':
             default:
                 $subscription_period = 'M';
                 break;
         }
         $sign_up_fee = WC_Subscriptions_Order::get_sign_up_fee($order);
         $price_per_period = WC_Subscriptions_Order::get_price_per_period($order);
         $subscription_interval = WC_Subscriptions_Order::get_subscription_interval($order);
         $subscription_length = WC_Subscriptions_Order::get_subscription_length($order);
         $subscription_trial_length = WC_Subscriptions_Order::get_subscription_trial_length($order);
         if ($subscription_trial_length > 0) {
             // Specify a free trial period
             $paypal_args['a1'] = $sign_up_fee > 0 ? $sign_up_fee : 0;
             // Add the sign up fee to the free trial period
             // Sign Up interval
             $paypal_args['p1'] = $subscription_trial_length;
             // Sign Up unit of duration
             $paypal_args['t1'] = $subscription_period;
         } elseif ($sign_up_fee > 0) {
             // No trial period, so charge sign up fee and per period price for the first period
             if ($subscription_length == 1) {
                 $param_number = 3;
             } else {
                 $param_number = 1;
             }
             $paypal_args['a' . $param_number] = $price_per_period + $sign_up_fee;
             // Sign Up interval
             $paypal_args['p' . $param_number] = $subscription_interval;
             // Sign Up unit of duration
             $paypal_args['t' . $param_number] = $subscription_period;
         }
         // We have a recurring payment
         if (!isset($param_number) || $param_number == 1) {
             // Subscription price
             $paypal_args['a3'] = $price_per_period;
             // Subscription duration
             $paypal_args['p3'] = $subscription_interval;
             // Subscription period
             $paypal_args['t3'] = $subscription_period;
         }
         // Recurring payments
         if ($subscription_length == 1 || $sign_up_fee > 0 && $subscription_trial_length == 0 && $subscription_length == 2) {
             // Non-recurring payments
             $paypal_args['src'] = 0;
         } else {
             $paypal_args['src'] = 1;
             if ($subscription_length > 0) {
                 if ($sign_up_fee > 0 && $subscription_trial_length == 0) {
                     // An initial period is being used to charge a sign-up fee
                     $subscription_length--;
                 }
                 $paypal_args['srt'] = $subscription_length / $subscription_interval;
             }
         }
         // Force return URL so that order description & instructions display
         $paypal_args['rm'] = 2;
     }
     return $paypal_args;
 }

 /**
  * Override the default PayPal standard args in WooCommerce for subscription purchases.
  *
  * @since 1.0
  */
 public static function paypal_standard_subscription_args($paypal_args)
 {
     extract(self::get_order_id_and_key($paypal_args));
     if (WC_Subscriptions_Order::order_contains_subscription($order_id) && 'yes' !== get_option(WC_Subscriptions_Admin::$option_prefix . '_turn_off_automatic_payments', 'no')) {
         $order = new WC_Order($order_id);
         $order_items = $order->get_items();
         // Only one subscription allowed in the cart when PayPal Standard is active
         $product = $order->get_product_from_item(array_pop($order_items));
         // It's a subscription
         $paypal_args['cmd'] = '_xclick-subscriptions';
         if (count($order->get_items()) > 1) {
             foreach ($order->get_items() as $item) {
                 if ($item['qty'] > 1) {
                     $item_names[] = $item['qty'] . ' x ' . $item['name'];
                 } else {
                     if ($item['qty'] > 0) {
                         $item_names[] = $item['name'];
                     }
                 }
             }
             $paypal_args['item_name'] = sprintf(__('Order %s', WC_Subscriptions::$text_domain), $order->get_order_number());
         } else {
             $paypal_args['item_name'] = $product->get_title();
         }
         $unconverted_periods = array('billing_period' => WC_Subscriptions_Order::get_subscription_period($order), 'trial_period' => WC_Subscriptions_Order::get_subscription_trial_period($order));
         $converted_periods = array();
         // Convert period strings into PayPay's format
         foreach ($unconverted_periods as $key => $period) {
             switch (strtolower($period)) {
                 case 'day':
                     $converted_periods[$key] = 'D';
                     break;
                 case 'week':
                     $converted_periods[$key] = 'W';
                     break;
                 case 'year':
                     $converted_periods[$key] = 'Y';
                     break;
                 case 'month':
                 default:
                     $converted_periods[$key] = 'M';
                     break;
             }
         }
         $sign_up_fee = WC_Subscriptions_Order::get_sign_up_fee($order);
         $initial_payment = WC_Subscriptions_Order::get_total_initial_payment($order);
         $price_per_period = WC_Subscriptions_Order::get_recurring_total($order);
         $subscription_interval = WC_Subscriptions_Order::get_subscription_interval($order);
         $subscription_installments = WC_Subscriptions_Order::get_subscription_length($order) / $subscription_interval;
         $subscription_trial_length = WC_Subscriptions_Order::get_subscription_trial_length($order);
         if ($subscription_trial_length > 0) {
             // Specify a free trial period
             $paypal_args['a1'] = $sign_up_fee > 0 ? $sign_up_fee : 0;
             // Maybe add the sign up fee to the free trial period
             // Trial period length
             $paypal_args['p1'] = $subscription_trial_length;
             // Trial period
             $paypal_args['t1'] = $converted_periods['trial_period'];
         } elseif ($sign_up_fee > 0 || $initial_payment !== $price_per_period) {
             // No trial period, so charge sign up fee and per period price for the first period
             if ($subscription_installments == 1) {
                 $param_number = 3;
             } else {
                 $param_number = 1;
             }
             $paypal_args['a' . $param_number] = $initial_payment;
             // Sign Up interval
             $paypal_args['p' . $param_number] = $subscription_interval;
             // Sign Up unit of duration
             $paypal_args['t' . $param_number] = $converted_periods['billing_period'];
         }
         // We have a recurring payment
         if (!isset($param_number) || $param_number == 1) {
             // Subscription price
             $paypal_args['a3'] = $price_per_period;
             // Subscription duration
             $paypal_args['p3'] = $subscription_interval;
             // Subscription period
             $paypal_args['t3'] = $converted_periods['billing_period'];
         }
         // Recurring payments
         if ($subscription_installments == 1 || $sign_up_fee > 0 && $subscription_trial_length == 0 && $subscription_installments == 2) {
             // Non-recurring payments
             $paypal_args['src'] = 0;
         } else {
             $paypal_args['src'] = 1;
             if ($subscription_installments > 0) {
                 if ($sign_up_fee > 0 && $subscription_trial_length == 0) {
                     // An initial period is being used to charge a sign-up fee
                     $subscription_installments--;
                 }
                 $paypal_args['srt'] = $subscription_installments;
             }
         }
         // Force return URL so that order description & instructions display
//.........这里部分代码省略.........

 /**
  * notify handler
  * @since 2.2.0
  */
 function notify_handler()
 {
     global $woocommerce;
     $redirect = get_permalink(woocommerce_get_page_id('cart'));
     if (isset($_GET['stripeListener']) && $_GET['stripeListener'] == 'stripe') {
         if ($this->debug == 'yes') {
             $this->log->add('stripe', __('Post form: ', 'woocommerce') . print_r($_POST, true));
         }
         if ($woocommerce->verify_nonce('stripe_payment_submit')) {
             $order_id = $this->get_request('order');
             $order = new WC_Order($order_id);
             if ($order->order_key != $_REQUEST['key']) {
                 $woocommerce->add_error(__('Order key do not match!', 'woocommerce'));
                 wp_redirect($redirect);
                 //redirect page
                 exit;
             }
             $order_items = $order->get_items();
             $product = $order->get_product_from_item(array_pop($order_items));
             $this->product_type = $product->product_type;
             $params = $this->get_params($order);
             if ($this->debug == 'yes') {
                 $this->log->add('stripe', __('Post paramaters: ', 'woocommerce') . print_r($params, true));
             }
             $request = new stripe_request($this->get_config());
             $response = '';
             if ('subscription' == $product->product_type || 'subscription_variation' == $product->product_type) {
                 if ($this->debug == 'yes') {
                     $this->log->add('stripe', 'Starting subscription ... ');
                 }
                 $sign_up_fee = WC_Subscriptions_Order::get_sign_up_fee($order);
                 $price_per_period = WC_Subscriptions_Order::get_price_per_period($order);
                 $subscription_interval = WC_Subscriptions_Order::get_subscription_interval($order);
                 $subscription_length = WC_Subscriptions_Order::get_subscription_length($order);
                 $subscription_trial_length = WC_Subscriptions_Order::get_subscription_trial_length($order);
                 // Subscription unit of duration
                 switch (strtolower(WC_Subscriptions_Order::get_subscription_period($order))) {
                     case 'year':
                         $subscription_period = 'year';
                         break;
                     case 'month':
                     default:
                         $subscription_period = 'month';
                         break;
                 }
                 // add more param
                 $sparams = array();
                 $plan_name = get_post($product->id)->post_title;
                 //$plan_id = $product->id;
                 $plan_id = $order_id;
                 $response = $request->send($plan_id, 'retrieve');
                 if (!$response->success()) {
                     //create plan if not exists
                     if ($this->debug == 'yes') {
                         $this->log->add('stripe', sprintf(__('Create plan id: %s', 'woocommerce'), $plan_id));
                     }
                     $response = $request->send(array('amount' => number_format($price_per_period, 2, '.', '') * 100, 'interval' => $subscription_period, "currency" => $params['currency'], "id" => $plan_id, 'name' => $plan_name, 'trial_period_days' => $subscription_trial_length), 'plan');
                 }
                 if ($response->success()) {
                     if ($this->debug == 'yes') {
                         $this->log->add('stripe', print_r($response, true));
                     }
                     $response = $request->send(array("card" => $params['card'], "plan" => $plan_id, "email" => $order->billing_email), 'customer');
                     if ($this->debug == 'yes') {
                         $this->log->add('stripe', 'Customer create: ' . print_r($response->results, true));
                     }
                     if ($response->success() && $sign_up_fee > 0) {
                         $response = $request->send(array("customer" => $response->results->id, "amount" => number_format($sign_up_fee, 2, '.', '') * 100, "currency" => $params['currency'], "description" => __("Sign-up Fee", 'woocommerce')));
                         if ($this->debug == 'yes') {
                             $this->log->add('stripe', 'Sign-up fee response: ' . print_r($response->results, true));
                         }
                     }
                 } else {
                     //error
                     if ($this->debug == 'yes') {
                         $this->log->add('stripe', __('Error can not create plan', 'woocommerce'));
                     }
                     $woocommerce->add_error(__('Error can not create plan', 'woocommerce'));
                 }
             } else {
                 $response = $request->send($params);
             }
             //response result
             if ($response->success()) {
                 $order->add_order_note(__('Stripe payment completed', 'woocommerce') . ' (Transaction ID: ' . $response->get_transaction_id() . ')');
                 $order->payment_complete();
                 $woocommerce->cart->empty_cart();
                 $redirect = add_query_arg('key', $order->order_key, add_query_arg('order', $order_id, get_permalink(woocommerce_get_page_id('thanks'))));
             } else {
                 if ($this->debug == 'yes') {
                     $this->log->add('stripe', 'Error: ' . $response->get_error(), true);
                 }
                 $woocommerce->add_error(__('Payment error', 'woocommerce') . ': ' . $response->get_error() . '');
             }
         }
         wp_redirect($redirect);
//.........这里部分代码省略.........