Preliminary preparation:

After applying for WeChat payment, you will receive 2 parameters, merchant id, and merchant key.
Note , these two parameters should not be confused with WeChat parameters.
WeChat parameters: appid, appkey, token
Payment parameters: merchant_id (merchant number), key( Payment key)
How to get the payment key?
Go to https://pay.weixin.qq.com -->Account Center--> API security-->Set API key
Set a 32-bit key by yourself

WeChat payment process:

1. Composer installs the EasyWechat package

Environment requirements:

• ##PHP >= 5.5. 9

• ##PHP cURL extension

• PHP OpenSSL extension

2.1, Configure payment directory and authorized domain name ##2.2. Configure web page authorization

## 3. Initialize the SDK and create an EasyWeChat\Foundation\Application

<?php
use EasyWeChat\Foundation\Application;protected $app=null;public function construct(){   
$options = [   /**
     * Debug 模式，bool 值：true/false
     *
     * 當(dāng)值為 false 時，所有的日志都不會記錄     */
    &#39;debug&#39;  => true,    /**
     * 賬號基本信息，請從微信公眾平臺/開放平臺獲取     */
    &#39;app_id&#39;  => &#39;your-app-id&#39;,         // AppID
    &#39;secret&#39;  => &#39;your-app-secret&#39;,     // AppSecret
    &#39;token&#39;   => &#39;your-token&#39;,          // Token
    &#39;aes_key&#39; => &#39;&#39;,                    // EncodingAESKey，安全模式下請一定要填寫！??！

    /**
     * 日志配置
     *
     * level: 日志級別, 可選為：
     *         debug/info/notice/warning/error/critical/alert/emergency
     * permission：日志文件權(quán)限(可選)，默認為null（若為null值,monolog會取0644）
     * file：日志文件位置(絕對路徑!!!)，要求可寫權(quán)限     */
    &#39;log&#39; => [        &#39;level&#39;      => &#39;debug&#39;,
        &#39;permission&#39; => 0777,
        &#39;file&#39;       => &#39;/tmp/easywechat.log&#39;,
    ],    /**
     * OAuth 配置
     *
     * scopes：公眾平臺（snsapi_userinfo / snsapi_base），開放平臺：snsapi_login
     * callback：OAuth授權(quán)完成后的回調(diào)頁地址     */
    &#39;oauth&#39; => [        
            &#39;scopes&#39;   => [&#39;snsapi_userinfo&#39;],
        &#39;callback&#39; => &#39;/examples/oauth_callback.php&#39;,
    ],    /**
     * 微信支付     */
    &#39;payment&#39; => [        &#39;merchant_id&#39;        => &#39;your-mch-id&#39;,
        &#39;key&#39;                => &#39;key-for-signature&#39;,
        &#39;cert_path&#39;          => &#39;path/to/your/cert.pem&#39;, // XXX: 絕對路徑?。。?！
        &#39;key_path&#39;           => &#39;path/to/your/key&#39;,      // XXX: 絕對路徑！?。?！
        &#39;notify_url&#39;         => &#39;默認的訂單回調(diào)地址&#39;,       // 你也可以在下單時單獨設(shè)置來想覆蓋它
        // &#39;device_info&#39;     => &#39;013467007045764&#39;,
        // &#39;sub_app_id&#39;      => &#39;&#39;,
        // &#39;sub_merchant_id&#39; => &#39;&#39;,
        // ...
    ],];$this->$app = new Application($options);
}

$payment =$this->$app->payment;

5. Pass the order object order (order number, amount, openid) as parameters

<?phpuse EasyWeChat\Foundation\Application;use EasyWeChat\Payment\Order; 

$attributes = [ &#39;trade_type&#39; => &#39;JSAPI&#39;, // JSAPI，NATIVE，APP... &#39;body&#39; => &#39;iPad mini 16G 白色&#39;, &#39;detail&#39; => &#39;iPad mini 16G 白色&#39;,
&#39;out_trade_no&#39; => &#39;1217752501201407033233368018&#39;,//訂單號 &#39;total_fee&#39; => 5388, // 單位：分 &#39;notify_url&#39; => &#39;http://xxx.com/order-notify&#39;, // 支付結(jié)果通知網(wǎng)址，如果不設(shè)置則會使用配置里的默認地址 &#39;openid&#39; => &#39;當(dāng)前用戶的 openid&#39;, // trade_type=JSAPI，此參數(shù)必傳，用戶在商戶appid下的唯一標(biāo)識， // ... ]; $order = new Order($attributes);

6. Preprocessing, get A preprocessing id, payment->prepare(order);

$result = $payment->prepare($order);
if ($result->return_code == 'SUCCESS' && $result->result_code == 'SUCCESS'){    
$prepayId = $result->prepay_id;
}

7. Generate payment JS configuration

$json = $payment->configForPayment($prepayId); // 返回 json 字符串，如果想返回數(shù)組，傳第二個參數(shù) false

8. Will Write the order number and json into the user's payment confirmation template, trigger the js, and call up the payment

return view('done',['order'=>$ordersn,'json'=>$json]);

<script>$(&#39;form&#39;).submit (function() {
WeixinJSBridge.invoke(&#39;getBrandWCPayRequest&#39;, {!!$json!!},function(res){if(res.err_msg == "get_brand_wcpay_request：ok" ) {// 使用以上方式判斷前端返回,微信團隊鄭重提示：
// res.err_msg將在用戶支付成功后返回
// ok，但并不保證它絕對可靠。          }
      }
);return false;
});</script>

9. Successful callback

in the user After successful payment, the WeChat server will initiate a POST request to the callback URL set in the order, and the content of the request is an XML.

First configure the paid method in the middleware VerifyCsrfToken without going through CSRF verification

   public function paid(){$response =$this->$app->payment->handleNotify(function($notify, $successful){    // 使用通知里的 "微信支付訂單號" 或者 "商戶訂單號" 去自己的數(shù)據(jù)庫找到訂單
    $order = 查詢訂單($notify->out_trade_no); 
    if (!$order) { // 如果訂單不存在
        return 'Order not exist.'; // 告訴微信，我已經(jīng)處理完了，訂單沒找到，別再通知我了    }    // 如果訂單存在
    // 檢查訂單是否已經(jīng)更新過支付狀態(tài)
    if ($order->paid_at) { // 假設(shè)訂單字段“支付時間”不為空代表已經(jīng)支付
        return true; // 已經(jīng)支付成功了就不再更新了    }    // 用戶是否支付成功
    if ($successful) {        // 不是已經(jīng)支付狀態(tài)則修改為已經(jīng)支付狀態(tài)
        $order->paid_at = time(); // 更新支付時間為當(dāng)前時間
        $order->status = 'paid';
    } else { // 用戶支付失敗
        $order->status = 'paid_fail';
    }    $order->save(); // 保存訂單
    return true; // 返回處理完成});
    return $response;
}

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