php微信支付之APP支付方法
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2023-02-17 08:49:09
本文实例讲述了微信开放平台移动应用集成微信支付功能。分享给大家供大家参考。具体分析如下:
wechatapppay文件代码如下:
复制代码 代码如下:
<...
本文实例讲述了微信开放平台移动应用集成微信支付功能。分享给大家供大家参考。具体分析如下:
wechatapppay文件代码如下:
复制代码 代码如下:
<?php
namespace common\services\wechatpay;
class wechatapppay extends wechatpaybase
{
//package参数
public $package = [];
//异步通知参数
public $notify = [];
//推送预支付订单参数
protected $config = [];
//存储access token和获取时间的文件
protected $file;
//access token
protected $accesstoken;
//取access token的url
const access_token_url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s';
//生成预支付订单提交地址
const post_order_url = 'https://api.weixin.qq.com/pay/genprepay?access_token=%s';
public function __construct()
{
$this->file = __dir__ . '/payaccesstoken.txt';
}
/**
* 创建app支付最终返回参数
* @throws \exception
* @return multitype:string null
*/
public function createapppaydata()
{
$this->generateconfig();
$prepayid = $this->getprepayid();
try{
$array = [
'appid' => $this->appid,
'appkey' => $this->paysignkey,
'noncestr' => $this->getrandomstr(),
'package' => 'sign=wxpay',
'partnerid' => $this->partnerid,
'prepayid' => $prepayid,
'timestamp' => (string)time(),
];
$array['sign'] = $this->sha1sign($array);
unset($array['appkey']);
} catch(\exception $e) {
throw new \exception($e->getmessage());
}
return $array;
}
/**
* 验证支付成功后的通知参数
*
* @throws \exception
* @return boolean
*/
public function verifynotify()
{
try{
$staysignstr = $this->notify;
unset($staysignstr['sign']);
$sign = $this->signdata($staysignstr);
return $this->notify['sign'] === $sign;
} catch(\exception $e) {
throw new \exception($e->getmessage());
}
}
/**
* 魔术方法,给添加支付参数进来
*
* @param string $name 参数名
* @param string $value 参数值
*/
public function __set($name, $value)
{
$this->$name = $value;
}
/**
* 设置access token
* @param string $token
* @throws \exception
* @return boolean
*/
public function setaccesstoken()
{
try{
if(!file_exists($this->file) || !is_file($this->file)) {
$f = fopen($this->file, 'a');
fclose($f);
}
$content = file_get_contents($this->file);
if(!empty($content)) {
$info = json_decode($content, true);
if( time() - $info['gettime'] < 7150 ) {
$this->accesstoken = $info['accesstoken'];
return true;
}
}
//文件内容为空或access token已失效,重新获取
$this->outputaccesstokentofile();
} catch(\exception $e) {
throw new \exception($e->getmessage());
}
return true;
}
/**
* 写入access token 到文件
* @throws \exception
* @return boolean
*/
protected function outputaccesstokentofile()
{
try{
$f = fopen($this->file, 'wb');
$token = [
'accesstoken' => $this->getaccesstoken(),
'gettime' => time(),
];
flock($f, lock_ex);
fwrite($f, json_encode($token));
flock($f, lock_un);
fclose($f);
$this->accesstoken = $token['accesstoken'];
} catch(\exception $e) {
throw new \exception($e->getmessage());
}
return true;
}
/**
* 取access token
*
* @throws \exception
* @return string
*/
protected function getaccesstoken()
{
$url = sprintf(self::access_token_url, $this->appid, $this->appsecret);
$result = json_decode( $this->geturl($url), true );
if(isset($result['errcode'])) {
throw new \exception("get access token failed:{$result['errmsg']}");
}
return $result['access_token'];
}
/**
* 取预支付会话标识
*
* @throws \exception
* @return string
*/
protected function getprepayid()
{
$data = json_encode($this->config);
$url = sprintf(self::post_order_url, $this->accesstoken);
$result = json_decode( $this->posturl($url, $data), true );
if( isset($result['errcode']) && $result['errcode'] != 0 ) {
throw new \exception($result['errmsg']);
}
if( !isset($result['prepayid']) ) {
throw new \exception('get prepayid failed, url request error.');
}
return $result['prepayid'];
}
/**
* 组装预支付参数
*
* @throws \exception
*/
protected function generateconfig()
{
try{
$this->config = [
'appid' => $this->appid,
'traceid' => $this->traceid,
'noncestr' => $this->getrandomstr(),
'timestamp' => time(),
'package' => $this->generatepackage(),
'sign_method' => $this->sign_method,
];
$this->config['app_signature'] = $this->generatesign();
} catch(\exception $e) {
throw new \exception($e->getmessage());
}
}
/**
* 生成package字段
*
* 生成规则:
* 1、生成sign的值signvalue
* 2、对package参数再次拼接成查询字符串,值需要进行urlencode
* 3、将sign=signvalue拼接到2生成的字符串后面得到最终的package字符串
*
* 第2步urlencode空格需要编码成%20而不是+
*
* rfc 1738会把 空格编码成+
* rfc 3986会把空格编码成%20
*
* @return string
*/
protected function generatepackage()
{
$this->package['sign'] = $this->signdata($this->package);
return http_build_query($this->package, '', '&', php_query_rfc3986);
}
/**
* 生成签名
*
* @return string
*/
protected function generatesign()
{
$signarray = [
'appid' => $this->appid,
'appkey' => $this->paysignkey,
'noncestr' => $this->config['noncestr'],
'package' => $this->config['package'],
'timestamp' => $this->config['timestamp'],
'traceid' => $this->traceid,
];
return $this->sha1sign($signarray);
}
/**
* 签名数据
*
* 生成规则:
* 1、字典排序,拼接成查询字符串格式,不需要urlencode
* 2、上一步得到的字符串最后拼接上key=paternerkey
* 3、md5哈希字符串并转换成大写得到sign的值signvalue
*
* @param array $data 待签名数据
* @return string 最终签名结果
*/
protected function signdata($data)
{
ksort($data);
$str = $this->arraytostring($data);
$str .= "&key={$this->partnerkey}";
return strtoupper( $this->signmd5($str) );
}
/**
* sha1签名
* 签名规则
* 1、字典排序
* 2、拼接查询字符串
* 3、sha1运算
*
* @param array $arr
* @return string
*/
protected function sha1sign($arr)
{
ksort($arr);
return sha1( $this->arraytostring($arr) );
}
}
希望本文所述对大家的php程序设计有所帮助。
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