1.移动App中想要接入PayPal支付，婉转的采用PayPal的一种最简便的方式（网页版）。
<h1>PayPal支付</h1> <div class="orderinfo"> <ul> <li><label>商品名称：</label>流量支付</li> <li><label>订单编号：</label>{$out_trade_no}</li> <li><label>金额：</label>${$order_total}</li> </ul> <form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post"> <input type="hidden" name="cmd" value="_xclick"> <input type="hidden" name="business" value="xx.xx-facilitator@xxx.com"> <input type="hidden" name="item_name" value="SIGMA SD1000"> <!-- 商品名称 --> <input type="hidden" name="amount" value="{$order_total}"> <!-- 商品总价格 --> <input type="hidden" name="currency_code" value="USD"> <input type="hidden" name="custom" value="{$id}"> <!-- 传递订单id --> <input type="hidden" name="return" value="http://zjb.xxxxx.com"> <!-- 支付完成后的返回 --> <input type="hidden" name="notify_url" value="http://zjb.xxxxx.com/zmwx/index.php/xxxx/Order/paypal"> <!-- 回调通知地址 --> <input type="image" src="https://www.paypal.com/en_US/i/btn/btn_buynow_LG.gif " name="submit" alt=" PayPal - The safer, easier way to pay online"> </form> </div>这方式就是支付的时候体验不太好，容易500的错误，网络的限制。
2.支付完成后那就是回调了（这里使用的PayPal的IPN回调机制）：
/** * PayPal回调通知 */ public function paypal() { $ipn = file_get_contents(‘php://input‘); // $ipn = "mc_gross=399.00&protection_eligibility=Eligible&address_status=confirmed&payer_id=XEMQ4LGLL3E8U&address_street=%BF%C6%D4%B0%C2%B72%BA%C5A8%D2%F4%C0%D6%B4%F3%CF%C3&payment_date=19%3A18%3A52+Apr+07%2C+2017+PDT&payment_status=Completed&charset=gb2312&address_zip=518000&first_name=li&mc_fee=15.86&address_country_code=CN&address_name=%C9%EE%DB%DA%CA%D0%A1%A1%CA%A5%C2%EB%BF%C6%BC%BC¬ify_version=3.8&custom=664&payer_status=verified&business=yu.yu-facilitator%40zmartec.com&address_country=China&address_city=%C9%EE%DB%DA%CA%D0&quantity=1&verify_sign=AomRS5l2W2xlt2An.GaSrAzpCl-NAi.rf7W.QGkzsUIdF5RMnpDPvDzw&payer_email=zmartec%40zmartec.com&txn_id=32U88448K71697337&payment_type=instant&last_name=tao&address_state=GUANGDONG&receiver_email=yu.yu-facilitator%40zmartec.com&payment_fee=15.86&receiver_id=PEAD5Y5KWXRJU&txn_type=web_accept&item_name=SIGMA%2BSD1000&mc_currency=USD&item_number=&residence_country=US&test_ipn=1&transaction_subject=&payment_gross=399.00&ipn_track_id=b2b22318a3e9"; vendor(‘PaypalIPN.PaypalIPN‘) or die("方案7引入失败"); $pipn = new \PaypalIPN(); $ipn_response = $pipn->verifyIPN($ipn); // 验证通过&转换数据类型为array if (true === $ipn_response) { $raw_post_array = explode(‘&‘, $ipn); $myPost = array(); foreach ($raw_post_array as $keyval) { $keyval = explode(‘=‘, $keyval); if (count($keyval) == 2) { // 转换urlencode的+为%2B if ($keyval[0] === ‘payment_date‘) { if (substr_count($keyval[1], ‘+‘) === 1) { $keyval[1] = str_replace(‘+‘, ‘%2B‘, $keyval[1]); } } $myPost[$keyval[0]] = urldecode($keyval[1]); } } $fields = "od.`uid`,od.`currency`,od.`product_id`"; $order_detail = $this->_model->orderDetail($myPost[‘custom‘], $fields); // 卡号iccid $iccid = $this->_model->getIccidByid($order_detail[0][‘uid‘]);print_r($iccid); $iccid = $iccid[0][‘iccid‘]; // 套餐包id $product_id = $this->_model->getProductIdById($order_detail[0][‘product_id‘]); $product_id = $product_id[0][‘product_id‘]; // ①检查payment_status状态 if ("Completed" == $myPost[‘payment_status‘]) { // ②确保txn_id不重复 if ($this->_model->checkPayPalTxn($myPost[‘txn_id‘])) { // ③确保邮件未被更改 if ($this->paypayl_receiver_email == $myPost[‘receiver_email‘]) { // ④确保价格、商品与订单符合 if ($order_detail[0][‘order_total‘] == $myPost[‘mc_gross‘] && $order_detail[0][‘currency‘] == $myPost[‘mc_currency‘]) { $data = array( ‘status‘=>‘completed‘, ‘payment_methods‘ => ‘PayPal‘, ‘trade_no‘=>$myPost[‘txn_id‘], ‘changed_time‘=>time() ); $pay_result = $this->_model->saveOrderData( $data , $myPost[‘custom‘] ); $this->hong_cha_package_order($order_detail[0][‘out_trade_no‘], $myPost[‘custom‘], $product_id, $iccid, $order_detail[0][‘product_amount‘]); } else { echo "货币、价格与订单不符，请联系管理员."; } } else { echo "订单信息被修改，请联系管理员."; } } else { echo "订单已被处理，请勿重复."; } } else { echo "订单未支付完成."; } } else { echo "数据被黑，无法验证通过."; } }