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(),
];
$arra
Y['sign'] = $this->sha1Sign($array
);
unset($arra
Y['appkey']
);
} catch(\Exception $
E) {
throw new \Exception($e->get
message()
);
}
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->notif
Y['sign'] === $sign;
} catch(\Exception $
E) {
throw new \Exception($e->get
message()
);
}
}
/
**
* 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->fil
E) || !is_file($this->fil
E))
{
$f = fopen($this->file,'a'
);
fclose($f
);
}
$content = file_get_contents($this->fil
E);
if(!empty($content))
{
$info = json_decode($content,tru
E);
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->get
message()
);
}
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_E
X);
fwrite($f,json_encode($token)
);
flock($f,LOCK_UN
);
fclose($f
);
$this->accessToken = $token['accessToken'];
} catch(\Exception $
E) {
throw new \Exception($e->get
message()
);
}
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( $this->po
sturl($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,
'trac
EID' => $this->trac
EID,
'
timestamp' => time(),
'package' => $this->generatePackage(),
'sign_method' => $this->sign_method,
];
$this->config['app_signature'] = $this->generateSign(
);
} catch(\Exception $
E) {
throw new \Exception($e->get
message()
);
}
}
/
**
* 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->packag
E);
return
http_build_query($this->package,'','&',
php_QUERY_RFC3986
);
}
/
**
* 生成签名
*
* @return
String
*/
protected function generateSign()
{
$signArray = [
'appid' => $this->appid,
'noncestr' => $this->config['noncestr'],
'package' => $this->config['package'],
'
timestamp' => $this->config['
timestamp'],
];
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 = $this->arrayTo
String($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( $this->arrayTo
String($arr)
);
}
}
