1,必須要有
$mch_id
$key
$appid
這三個值,是需要去申請的,我是直接用公司的
2,購買商品
訂單號
用戶openid
統一下單名稱
商品價格(必須以分為單位,調起微信支付)
服務器的ip地址(沒有的話,就獲取自己本地)
3,構造函數,用來傳必須的參數
4,微信支付的坑也是多....我將代碼貼上來
class Applet extends Controller
{
/*
* 小程序微信支付
*/
protected $appid; //
protected $mch_id; //
protected $key;
protected $openid; //
protected $out_trade_no; //商戶訂單號
protected $body;//統一下單名稱
protected $total_fee; // 價格/分 100*100
protected $notify_url;//獲取ip地址
public function __construct($openid="",$total_fee="") {
$appid = "小程序id";
$mch_id = '商戶號';
$key = "key值";
$out_trade_no = date('Ymd').substr(implode(NULL, array_map('ord', str_split(substr(uniqid(), 7, 13), 1))), 0, 8);;
$body = '購買商品';
$this->appid = $appid;
$this->openid = $openid;
$this->mch_id = $mch_id;
$this->key = $key;
$this->out_trade_no =$out_trade_no;
$this->body =$body;
$this->total_fee = $total_fee;
$this->notify_url = $this->getRequestIp();
}
private function getRequestIp() {
return request()->ip();
}
public function pay() {
//統一下單接口
$arr = $this->weixinapp();
return HttpSuccess(json_decode($arr));
}
//微信小程序接口
private function weixinapp() {
//統一下單接口
$unifiedorder = $this->unifiedorder();
$parameters = array(
'appId' => $this->appid, //小程序ID
'timeStamp' => '' . time() . '', //時間戳
'nonceStr' => $this->createNoncestr(), //隨機串
'package' => 'prepay_id=' . $unifiedorder['prepay_id'], //數據包
'signType' => 'MD5'//簽名方式
);
//dump($parameters);
//簽名
$parameters['paySign'] = $this->getSign($parameters);
return json_encode($parameters);
}
//統一下單接口
private function unifiedorder() {
$url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
$parameters = array(
'appid' => $this->appid, //小程序ID
'mch_id' => $this->mch_id, //商戶號
'nonce_str' => $this->createNoncestr(), //隨機字符串
'body' => $this->body,
'out_trade_no'=> $this->out_trade_no,
'total_fee' => $this->total_fee,
'spbill_create_ip' => $this->notify_url, //終端IP
'notify_url' => $this->a(), //通知地址 確保外網能正常訪問
'openid' => $this->openid, //用戶id
'trade_type' => 'JSAPI'//交易類型
);
//統一下單簽名
$parameters['sign'] = $this->getSign($parameters);
$xmlData = $this->arrayToXml($parameters);
$return = $this->xmlToArray($this->postXmlCurl($xmlData, $url, 60));
//dump($return);
return $return;
}
function a(){
return config('server_host').'applet.php/applet/v1/wx/notify_url';
//return 'www.baidu.com';
}
private static function postXmlCurl($xml, $url, $second = 30)
{
$ch = curl_init();
//設置超時
curl_setopt($ch, CURLOPT_TIMEOUT, $second);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); //嚴格校驗
//設置header
curl_setopt($ch, CURLOPT_HEADER, FALSE);
//要求結果為字符串且輸出到屏幕上
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
//post提交方式
curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);
curl_setopt($ch, CURLOPT_TIMEOUT, 40);
set_time_limit(0);
//運行curl
$data = curl_exec($ch);
//返回結果
if ($data) {
curl_close($ch);
return $data;
} else {
$error = curl_errno($ch);
curl_close($ch);
throw new WxPayException("curl出錯,錯誤碼:$error");
}
}
//數組轉換成xml
private function arrayToXml($arr) {
$xml = "<root>";
foreach ($arr as $key => $val) {
if (is_array($val)) {
$xml .= "<" . $key . ">" . arrayToXml($val) . "</" . $key . ">";
} else {
$xml .= "<" . $key . ">" . $val . "</" . $key . ">";
}
}
$xml .= "</root>";
return $xml;
}
//xml轉換成數組
private function xmlToArray($xml) {
//禁止引用外部xml實體
libxml_disable_entity_loader(true);
$xmlstring = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);
$val = json_decode(json_encode($xmlstring), true);
return $val;
}
//作用:產生隨機字符串,不長於32位
private function createNoncestr($length = 32) {
$chars = "abcdefghijklmnopqrstuvwxyz0123456789";
$str = "";
for ($i = 0; $i < $length; $i++) {
$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
}
return $str;
}
//作用:生成簽名
private function getSign($Obj) {
foreach ($Obj as $k => $v) {
$Parameters[$k] = $v;
}
//簽名步驟一:按字典序排序參數
ksort($Parameters);
$String = $this->formatBizQueryParaMap($Parameters, false);
//簽名步驟二:在string后加入KEY
$String = $String . "&key=" . $this->key;
//簽名步驟三:MD5加密
$String = md5($String);
//簽名步驟四:所有字符轉為大寫
$result_ = strtoupper($String);
return $result_;
}
//作用:格式化參數,簽名過程需要使用
private function formatBizQueryParaMap($paraMap, $urlencode) {
$buff = "";
ksort($paraMap);
foreach ($paraMap as $k => $v) {
if ($urlencode) {
$v = urlencode($v);
}
$buff .= $k . "=" . $v . "&";
}
$reqPar;
if (strlen($buff) > 0) {
$reqPar = substr($buff, 0, strlen($buff) - 1);
}
return $reqPar;
}
5,價格最好以分的形式存儲....
6,我自己調用的微信支付
先貼圖
來看代碼
實例化類,調用里面的pay方法,over
$pay = new Applet($openid,$find['fee']);
$arr = $pay->pay();
7,TP5回調小程序微信支付
最簡單便捷的一種方法就是。支付成功后,微信那邊會給前端一些支付成功的數據,然后讓前端傳給你(訂單號),你便使用redis,事務,將這個訂單改為支付狀態就可以了
8,TP5在待付款中,再次調用微信支付
讓前端傳給你訂單號,通過這個訂單號,拿到相對應的數據,便可以再次調用微信支付
$pay = new Applet($param['openid'],$find['fee']);
$arr = $pay->pay();
也是這兩句代碼
9,注意!!!!調用微信支付的時候,傳了兩個值,再次調用微信支付的時候,也是兩個值,多了,微信那邊,不會允許你調起微信支付