小程序端
调用wx.requestPayment，所需要的参数都从服务端获取
服务端
小程序需要的参数：
小程序端需要的参数需要从服务端获取，这样签名才能一致
/**
* 随机数
* @param $length
* @param int $numeric
* @return string
*/
public function random($length, $numeric = 0)
{
PHP_VERSION < '4.2.0' ? mt_srand((double)microtime() * 1000000) : mt_srand();
$seed = base_convert(md5(print_r($_SERVER, 1) . microtime()), 16, $numeric ? 10 : 35);
$seed = $numeric ? (str_replace('0', '', $seed) . '012340567890') : ($seed . 'zZ' . strtoupper($seed));
$hash = '';
$max = strlen($seed) - 1; for ($i = 0; $i < $length; $i++) {
$hash .= $seed[mt_rand(0, $max)];
} return $hash;
} public function paysing()
{
$appid='';
$key='';//商户的api密钥
$nonce_str=$this->random(15);//随机数，可自己写个方法生成
$prepay_id=$this->post->prepay_id;
$timestamp=time();
$paySign = MD5("appId=$appid&nonceStr=$nonce_str&package=prepay_id=$prepay_id&signType=MD5&timeStamp=$timestamp&key=$key");
$json = array();
$json['paysign'] = strtoupper($paySign);
$json['timeStamp'] = $timestamp.'';
$json['nonceStr'] = $nonce_str;
$json['package'] ='prepay_id='.$prepay_id; return $this->enJson(200,'获取成功',$json);
}工具类
注意：小程序支付需要额外的参数openid，所以我复制了工具类下单的方法，unifiedOrder2
payapi.php
<?phpclass wechatAppPay{//接口API URL前缀
const API_URL_PREFIX = 'https://api.mch.weixin.qq.com';//下单地址URL
const UNIFIEDORDER_URL = "/pay/unifiedorder";//查询订单URL
const ORDERQUERY_URL = "/pay/orderquery";//关闭订单URL
const CLOSEORDER_URL = "/pay/closeorder";//公众账号ID
private $appid;//商户号
private $mch_id;//随机字符串
private $nonce_str;//签名
private $sign;//商品描述
private $body;//商户订单号
private $out_trade_no;//支付总金额
private $total_fee;//终端IP
private $spbill_create_ip;//支付结果回调通知地址
private $notify_url;//交易类型
private $trade_type;//支付密钥
private $key;//证书路径
private $SSLCERT_PATH; private $SSLKEY_PATH;//所有参数
private $params = array(); public function __construct($appid, $mch_id, $notify_url, $key)
{ $this->appid = $appid; $this->mch_id = $mch_id; $this->notify_url = $notify_url; $this->key = $key;
} /**
* 下单方法
* @param $params 下单参数
*/
public function unifiedOrder( $params ){ $this->body = $params['body']; $this->out_trade_no = $params['out_trade_no']; $this->total_fee = $params['total_fee']; $this->trade_type = $params['trade_type']; $this->nonce_str = $this->genRandomString(); $this->spbill_create_ip = $_SERVER['REMOTE_ADDR']; $this->params['appid'] = $this->appid; $this->params['mch_id'] = $this->mch_id; $this->params['nonce_str'] = $this->nonce_str; $this->params['body'] = $this->body; $this->params['out_trade_no'] = $this->out_trade_no; $this->params['total_fee'] = $this->total_fee; $this->params['spbill_create_ip'] = $this->spbill_create_ip; $this->params['notify_url'] = $this->notify_url; $this->params['trade_type'] = $this->trade_type;//获取签名数据
$this->sign = $this->MakeSign( $this->params ); $this->params['sign'] = $this->sign;
$xml = $this->data_to_xml($this->params);
$response = $this->postXmlCurl($xml, self::API_URL_PREFIX.self::UNIFIEDORDER_URL); if( !$response ){ return false;
}
$result = $this->xml_to_data( $response ); if( !empty($result['result_code']) && !empty($result['err_code']) ){
$result['err_msg'] = $this->error_code( $result['err_code'] );
} return $result;
} /**
* 小程序 下单方法
* @param $params
* @return bool|mixed
*/
public function unifiedOrder2( $params ){ $this->body = $params['body']; $this->out_trade_no = $params['out_trade_no']; $this->total_fee = $params['total_fee']; $this->trade_type = $params['trade_type']; $this->nonce_str = $this->genRandomString(); $this->spbill_create_ip = $_SERVER['REMOTE_ADDR']; $this->params['appid'] = $this->appid; $this->params['mch_id'] = $this->mch_id; $this->params['nonce_str'] = $this->nonce_str; $this->params['body'] = $this->body; $this->params['out_trade_no'] = $this->out_trade_no; $this->params['total_fee'] = $this->total_fee; $this->params['spbill_create_ip'] = $this->spbill_create_ip; $this->params['notify_url'] = $this->notify_url; $this->params['trade_type'] = $this->trade_type; $this->params['openid'] = $params['openid'];//获取签名数据
$this->sign = $this->MakeSign( $this->params ); $this->params['sign'] = $this->sign;
$xml = $this->data_to_xml($this->params);
$response = $this->postXmlCurl($xml, self::API_URL_PREFIX.self::UNIFIEDORDER_URL); if( !$response ){ return false;
}
$result = $this->xml_to_data( $response ); if( !empty($result['result_code']) && !empty($result['err_code']) ){
$result['err_msg'] = $this->error_code( $result['err_code'] );
} return $result;
} /**
* 查询订单信息
* @param $out_trade_no 订单号
* @return array
*/
public function orderQuery( $out_trade_no ){ $this->params['appid'] = $this->appid; $this->params['mch_id'] = $this->mch_id; $this->params['nonce_str'] = $this->genRandomString(); $this->params['out_trade_no'] = $out_trade_no;//获取签名数据
$this->sign = $this->MakeSign( $this->params ); $this->params['sign'] = $this->sign;
$xml = $this->data_to_xml($this->params);
$response = $this->postXmlCurl($xml, self::API_URL_PREFIX.self::ORDERQUERY_URL); if( !$response ){ return false;
}
$result = $this->xml_to_data( $response ); if( !empty($result['result_code']) && !empty($result['err_code']) ){
$result['err_msg'] = $this->error_code( $result['err_code'] );
} return $result;
} /**
* 关闭订单
* @param $out_trade_no 订单号
* @return array
*/
public function closeOrder( $out_trade_no ){ $this->params['appid'] = $this->appid; $this->params['mch_id'] = $this->mch_id; $this->params['nonce_str'] = $this->genRandomString(); $this->params['out_trade_no'] = $out_trade_no;//获取签名数据
$this->sign = $this->MakeSign( $this->params ); $this->params['sign'] = $this->sign;
$xml = $this->data_to_xml($this->params);
$response = $this->postXmlCurl($xml, self::API_URL_PREFIX.self::CLOSEORDER_URL); if( !$response ){ return false;
}
$result = $this->xml_to_data( $response ); return $result;
} /**
*
* 获取支付结果通知数据
* return array
*/
public function getNotifyData(){//获取通知的数据
$xml = $GLOBALS['HTTP_RAW_POST_DATA']; //$xml = file_get_contents('php://input');
$data = array(); if( empty($xml) ){ return false;
}
$data = $this->xml_to_data( $xml ); if( !empty($data['return_code']) ){ if( $data['return_code'] == 'FAIL' ){ return false;
}
} return $data;
} /**
* 接收通知成功后应答输出XML数据
* @param string $xml
*/
public function replyNotify(){ /* ksort($data);
$buff = '';
foreach ($data as $k => $v){
if($k != 'sign'){
$buff .= $k . '=' . $v . '&';
}
}
$stringSignTemp = $buff . 'key=a1M5s4s6a4r8t4g2h3Md36AlJ8s7f5sd';//key为证书密钥
$sign = strtoupper(md5($stringSignTemp));
//判断算出的签名和通知信息的签名是否一致
if($sign == $data['sign']){
//处理完成之后，告诉微信成功结果
echo '<xml>
<return_code><![CDATA[SUCCESS]]></return_code>
<return_msg><![CDATA[OK]]></return_msg>
</xml>';
exit();
}
*/
$data['return_code'] = 'SUCCESS';
$data['return_msg'] = 'OK';
$xml = $this->data_to_xml( $data ); echo $xml; die();
} /**
* 生成APP端支付参数
* @param $prepayid 预支付id
*/
public function getAppPayParams( $prepayid ){
$data['appid'] = $this->appid;
$data['partnerid'] = $this->mch_id;
$data['prepayid'] = $prepayid;
$data['package'] = 'Sign=WXPay';
$data['noncestr'] = $this->genRandomString();
$data['timestamp'] = time();
$data['sign'] = $this->MakeSign( $data ); return $data;
} /**
* 生成签名
* @return 签名
*/
public function MakeSign( $params ){//签名步骤一：按字典序排序数组参数
ksort($params);
$string = $this->ToUrlParams($params);//签名步骤二：在string后加入KEY
$string = $string . "&key=".$this->key;//签名步骤三：MD5加密
$string = md5($string);//签名步骤四：所有字符转为大写
$result = strtoupper($string); return $result;
} /**
* 将参数拼接为url: key=value&key=value
* @param $params
* @return string
*/
public function ToUrlParams( $params ){
$string = ''; if( !empty($params) ){
$array = array(); foreach( $params as $key => $value ){
$array[] = $key.'='.$value;
}
$string = implode("&",$array);
} return $string;
} /**
* 输出xml字符
* @param $params 参数名称
* return string 返回组装的xml
**/
public function data_to_xml( $params ){ if(!is_array($params)|| count($params) <= 0)
{ return false;
}
$xml = "<xml>"; foreach ($params as $key=>$val)
{ if (is_numeric($val)){
$xml.="<".$key.">".$val."</".$key.">";
}else{
$xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
}
}
$xml.="</xml>"; return $xml;
} /**
* 将xml转为array
* @param string $xml
* return array
*/
public function xml_to_data($xml){ if(!$xml){ return false;
}//将XML转为array//禁止引用外部xml实体
libxml_disable_entity_loader(true);
$data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true); return $data;
} /**
* 获取毫秒级别的时间戳
*/
private static function getMillisecond(){//获取毫秒的时间戳
$time = explode ( " ", microtime () );
$time = $time[1] . ($time[0] * 1000);
$time2 = explode( ".", $time );
$time = $time2[0]; return $time;
} /**
* 产生一个指定长度的随机字符串,并返回给用户
* @param type $len 产生字符串的长度
* @return string 随机字符串
*/
private function genRandomString($len = 32) {
$chars = array( "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9"
);
$charsLen = count($chars) - 1;// 将数组打乱
shuffle($chars);
$output = ""; for ($i = 0; $i < $len; $i++) {
$output .= $chars[mt_rand(0, $charsLen)];
} return $output;
} /**
* 以post方式提交xml到对应的接口url
*
* @param string $xml 需要post的xml数据
* @param string $url url
* @param bool $useCert 是否需要证书，默认不需要
* @param int $second url执行超时时间，默认30s
* @throws WxPayException
*/
private function postXmlCurl($xml, $url, $useCert = false, $second = 30){
$ch = curl_init();//设置超时
curl_setopt($ch, CURLOPT_TIMEOUT, $second);
curl_setopt($ch,CURLOPT_URL, $url);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,2);//设置header
curl_setopt($ch, CURLOPT_HEADER, FALSE);//要求结果为字符串且输出到屏幕上
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); if($useCert == true){//设置证书//使用证书：cert 与 key 分别属于两个.pem文件
curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM');//curl_setopt($ch,CURLOPT_SSLCERT, WxPayConfig::SSLCERT_PATH);
curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM');//curl_setopt($ch,CURLOPT_SSLKEY, WxPayConfig::SSLKEY_PATH);
}//post提交方式
curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);//运行curl
$data = curl_exec($ch);//返回结果
if($data){
curl_close($ch); return $data;
} else {
$error = curl_errno($ch);
curl_close($ch); return false;
}
} /**
* 错误代码
* @param $code 服务器输出的错误代码
* return string
*/
public function error_code( $code ){
$errList = array( 'NOAUTH' => '商户未开通此接口权限', 'NOTENOUGH' => '用户帐号余额不足', 'ORDERNOTEXIST' => '订单号不存在', 'ORDERPAID' => '商户订单已支付，无需重复操作', 'ORDERCLOSED' => '当前订单已关闭，无法支付', 'SYSTEMERROR' => '系统错误!系统超时', 'APPID_NOT_EXIST' => '参数中缺少APPID', 'MCHID_NOT_EXIST' => '参数中缺少MCHID', 'APPID_MCHID_NOT_MATCH' => 'appid和mch_id不匹配', 'LACK_PARAMS' => '缺少必要的请求参数', 'OUT_TRADE_NO_USED' => '同一笔交易不能多次提交', 'SIGNERROR' => '参数签名结果不正确', 'XML_FORMAT_ERROR' => 'XML格式错误', 'REQUIRE_POST_METHOD' => '未使用post传递参数 ', 'POST_DATA_EMPTY' => 'post数据不能为空', 'NOT_UTF8' => '未使用指定编码格式',
); if( array_key_exists( $code , $errList ) ){ return $errList[$code];
}
}
}统一下单
include_once "payapi.php";
$params['body'] = $bodys; //商品描述
$params['out_trade_no'] = $order; //自定义的订单号
$params['total_fee'] = $allmoney*100; //订单金额 只能为整数 单位为分
$params['trade_type'] = 'JSAPI'; //交易类型 JSAPI | NATIVE | APP | WAP
$params['openid'] = ‘22222222’;//微信用户的openid
$PAYAPPID = $pay->appid;
$PAYKEY = 'xxxx';//商户密钥
$PAYMCHID = 'xxxxx';//商户id
$NOTIFY_URL = 'http://xxxxx';//这里只需填写你网址即可
$wechatAppPay = new wechatAppPay($PAYAPPID, $PAYMCHID, $NOTIFY_URL, $PAYKEY);
$result = $wechatAppPay->unifiedOrder2( $params ); if ($result['result_code']=='SUCCESS'&&$result['return_code']=='SUCCESS') { //下单成功,记录在库处理逻辑
//..............
//....................
//返回订单号,后面小程序拿来查询订单的状态的
result['out_trade_no'] = $order; return $this->enJson(200, '下单成功', $result);
}小程序支付成功后调用查询订单接口，修改订单状态：
//查询订单状态
$PAYAPPID = $appid;
$PAYKEY = $paykey;
$PAYMCHID = $mch_id;
$NOTIFY_URL = 'https://www.xxxxx';
$out_trade_no=$_POST['out_trade_no'];//自定义的订单号
$openid =$_POST['openid'];
$wechatAppPay = new wechatAppPay($PAYAPPID, $PAYMCHID, $NOTIFY_URL, $PAYKEY);
$res=$wechatAppPay->orderQuery($out_trade_no); if ($res['return_code']=='SUCCESS'&&$res['result_code']=='SUCCESS'&&$res['trade_state']=='SUCCESS'){ //支付成功,修改订单状态}基本的流程差不多就是这个样子了，如果哪里不对或不明确欢迎留言
作者：心之所善兮
链接：https://www.jianshu.com/p/8d1ac4123aab
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