LINE PAY – PHP串接

記錄一下這次串接的經驗

LINE Pay 確實很好串接，一切都非常順利

首先，寫一個取得LINE Pay 付款網址用的 class

class getLPUrl
{
    private $channelId = "";
    private $channelSecret = "";
    private $queryHost = "";
    private $queryUrl = "";
    private $body = array();
    private $packageInfoList = array();
    private $data = array();
    public function __construct($transactionId, $price, $title, $detailName, $url,  $host, $channelId, $channelSecret)
    {
        $this->channelId = $channelId;
        $this->channelSecret = $channelSecret;
        $this->queryUrl = $url;
        $this->queryHost = $host;

        $this->body["orderId"] = $transactionId;
        $this->body["currency"] = "TWD";
        $this->body["amount"] = $price*1;
        $this->body["packages"] = [[
            "id" => "package1",
            "amount" => $price*1,
            "name" => $title,
            "products" => [[
                "name" => $detailName,
                "quantity" => 1,
                "price" => $price*1
            ]]]];
        $this->body["redirectUrls"] = [
            "confirmUrl" => "成功時打開的頁面",
            "cancelUrl" => "失敗時打開的頁面"
        ];
    }
    public function send()
    {
        $bodyJson = json_encode($this->body, JSON_UNESCAPED_UNICODE);

        // ==== 建立 nonce ====
        $nonce = bin2hex(random_bytes(16)); // 亂數字串

        // ==== 建立 HMAC 簽章 ====
        $signatureStr = $this->channelSecret . $this->queryUrl . $bodyJson . $nonce;
        $hash = hash_hmac('sha256', $signatureStr, $this->channelSecret, true);
        $signature = base64_encode($hash);

        // ==== 設定 Header（注意這裡改成 X-LINE-Authorization）====
        $headers = [
            "Content-Type: application/json",
            "X-LINE-ChannelId: {$this->channelId}",
            "X-LINE-Authorization-Nonce: {$nonce}",
            "X-LINE-Authorization: {$signature}"
        ];

        $ret = sendPostJsonLP($this->queryHost.$this->queryUrl, $bodyJson, $headers);
        $this->data = json_decode($ret, true);

        if (isset($this->data['returnCode']) && $this->data['returnCode'] === '0000') {
            return true;
        }
        return false;
    }
    public function get($key)
    {
        if($key == "web"){
            $paymentUrl = $this->data['info']['paymentUrl']['web'];
            return $paymentUrl;
        }else{
            return $this->data;
        }
    }
}


public static function sendPostJsonLP($apiUrl, $bodyJson, $headers) {
        // ==== 發送 API ====
        $ch = curl_init($apiUrl);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $bodyJson);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $response = curl_exec($ch);
    
        if (curl_errno($ch)) {
            echo "cURL Error: " . curl_error($ch);
        }
        curl_close($ch);
        return $response;
    }

使用時

$tradeNo = generateUniqueString();      //亂數
$price = 1234;  //價格
$title = "這是標題";
$detailName = "這是內文";
$LP_url = "/v3/payments/request"; //固定的
$LP_Sandbox = "https://sandbox-api-pay.line.me"; //測試環境
$LP_Production = "https://api-pay.line.me";      //線上環境
$LP_host = $LP_Production;

$LP_channelId = "跟Line Pay 申請";
$LP_channelSecret = "跟Line Pay 申請";

$tool = new getLPUrl($tradeNo, $price, $title, $detailName, $LP_url, $LP_host, $LP_channelId, $LP_channelSecret);
if($tool->send()){
     $payUrl = $tool->get("web");
}

這個$payUrl 就可以拿來給客人打開付款了

另外付款後的成功頁面也很重要

$transactionId = $_GET['transactionId'];
$orderId = $_GET['orderId'];


$LP_channelId = "跟Line Pay 申請";
$LP_channelSecret = "跟Line Pay 申請";

$Sandbox = "https://sandbox-api-pay.line.me";
$Production = "https://api-pay.line.me";
$url = "/v3/payments/$transactionId/confirm";  //這邊要串上拿到的transactionId
$apiUrl = $Production.$url;

//建立回傳物件，這邊要我們確認金額，填我們真正想要的。
$body = [
    "amount" => $amount*1,
    "currency" => "TWD"
];

$bodyJson = json_encode($body, JSON_UNESCAPED_UNICODE);

// ==== 建立 nonce ====
$nonce = bin2hex(random_bytes(16)); // 亂數字串

// ==== 建立 HMAC 簽章 ====
$signatureStr = $channelSecret . $url . $bodyJson . $nonce;
$hash = hash_hmac('sha256', $signatureStr, $channelSecret, true);
$signature = base64_encode($hash);

// ==== 設定 Header（注意這裡改成 X-LINE-Authorization）====
$headers = [
    "Content-Type: application/json",
    "X-LINE-ChannelId: {$channelId}",
    "X-LINE-Authorization-Nonce: {$nonce}",
    "X-LINE-Authorization: {$signature}"
];

// ==== 發送 API ====
$ch = curl_init($apiUrl);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_POSTFIELDS, $bodyJson);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);

if (!curl_errno($ch)) {
    $data = json_decode($response, true);

    $rtnCode = $data['returnCode'];
    $rtnMsg =$data['returnMessage'];

    if (isset($data['returnCode']) && $data['returnCode'] === '0000') {
        $payStatus = true; // 這邊算是完成收款了
    }
}

收款開心