php微信支付之APP支付方法

2020-03-22 19:03:01

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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;
html' target='_blank'>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(),

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