要實現(xiàn)微信小程序的支付功能，首先必須要有訂單支撐。

一 、小程序通過請求接口創(chuàng)建平臺訂單，訂單創(chuàng)建成功后返回小程序拉起支付需要的數(shù)據(jù)。

Db::startTrans();
//這個是自己平臺的訂單信息
$orderInfo=[];
//通過JSAPI下單
// 1、請求參數(shù)
$postJson = [
    "appid" => '小程序appid',
    "mchid" => '商戶號',
    "description" => '商品信息',
    "out_trade_no" => '自己平臺的訂單號',
    "notify_url" => '用于接收微信支付結果的回調(diào)接口',
    "amount" => [
        "total" => 100 //付款金額，單位為分
    ],                    
    "payer" => [
        "openid" => '付款用戶的openid',
    ]
];
$time = time();
// 2、頭部簽名
$url = "https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi";
$urlarr = parse_url($url);
$data = json_encode($postJson);
$noncestr = $time;
$key = $this->getSign($data, $urlarr['path'], $noncestr, $time);//簽名
$token = sprintf('mchid="%s",serial_no="%s",nonce_str="%s",timestamp="%d",signature="%s"', '商戶號', '微信支付API證書序列號', $noncestr, $time, $key);//頭部信息
$header = [
    'Content-Type:' . 'application/json; charset=UTF-8',
    'Accept:application/json',
    'User-Agent:*/*',
    'Authorization: WECHATPAY2-SHA256-RSA2048 ' . $token
];
$resp = http_post($url,$postJson,$header);
$resp = json_decode($resp,true);
if(isset($resp['prepay_id'])){
    $return = [
        "appId"=>'小程序appid',
        "timeStamp"=>$time,
        'package' => 'prepay_id=' . $resp['prepay_id'],
        'paySign' => $this->getWechartSign('小程序appid', $time, $noncestr, 'prepay_id=' . $resp['prepay_id']),//微信支付（小程序）簽名
        "nonceStr"=>$time
    ];
    Db::commit();
    return self::jsonStr(['code'=>1,'msg'=>'下單成功','data'=>$return]);
}else{
    Db::rollback();
    return self::jsonStr(['code'=>0,'msg'=>'支付訂單創(chuàng)建失??！','data'=>$resp]);
}

代碼中用到的簽名方法如下

//微信支付簽名
public function getSign($data = [], $url, $randstr, $time) {
    $str = "POST" . "\n" . $url . "\n" . $time . "\n" . $randstr . "\n" . $data . "\n";
    $key = file_get_contents($_SERVER['DOCUMENT_ROOT'].'/cert/apiclient_key.pem');//在商戶平臺下載的秘鑰
    $str = $this->getSha256WithRSA($str, $key);
    return $str;
}
//調(diào)起支付的簽名
public function getWechartSign($appid, $timeStamp, $noncestr, $prepay_id) {
    $str = $appid . "\n" . $timeStamp . "\n" . $noncestr . "\n" . $prepay_id . "\n";
    $key = file_get_contents($_SERVER['DOCUMENT_ROOT'].'/cert/apiclient_key.pem');
    $str = $this->getSha256WithRSA($str, $key);
    return $str;
}
public function getSha256WithRSA($content, $privateKey) {
    $binary_signature = "";
    $algo = "SHA256";
    openssl_sign($content, $binary_signature, $privateKey, $algo);
    $sign = base64_encode($binary_signature);
    return $sign;
}

二、微信小程序獲取到上一步返回的調(diào)起微信支付的配置信息，然后通過wx.requestPayment調(diào)起支付界面。文章來源地址http://www.zghlxwxcb.cn/news/detail-714872.html

wx.requestPayment({
    "timeStamp": timeStamp+'',//必須字符串類型
    "nonceStr":  nonceStr+'',//必須字符串類型
    "package": package,
    "signType": "RSA",
    "paySign": paySign,
    "success":function(res){
        if (res.errMsg === 'requestPayment:ok') {
            wx.showModal({
            title: '支付成功',
            showCancel:false,
            complete: (res) => {
                //支付成功后的操作
            })
        }else{
            wx.showToast({
                icon:"none",
                title: '支付失敗',
            })
        }
    },
    "fail":function(res){
        if(res.errMsg == 'requestPayment:fail cancel'){
            wx.showToast({
                icon:"none",
                title: '支付已取消',
            })
        }else{
            wx.showToast({
                icon:"none",
                title: res.errMsg
            })
        }
    }
});

到了這里，關于Thinkphp6接入打通微信小程序支付功能的文章就介紹完了。如果您還想了解更多內(nèi)容，請在右上角搜索TOY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關文章，希望大家以后多多支持TOY模板網(wǎng)！