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:<?phpnamespace commonservicesWechatPay;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。
