/**

• 获取access_token
• @return mixed|boolean|unknown
  */
  public function getToken(){
  $cache_token = S('exp_wechat_pay_token');
  if(!empty($cache_token)){
  return $cache_token;
  }
  $url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s';
  $url = sprintf($url,$this->options['appid'],$this->options['appsecret']);
  $result = $this->http_get($url);
  $result = json_decode($result,true);
  if(empty($result)){
  return false;
  }
  S('exp_wechat_pay_token',$result['access_token'],array('type'=>'file','expire'=>3600));
  return $result['access_token'];
  }

/**

• 发送客服消息
• @param array $data 消息结构{"touser":"OPENID","msgtype":"news","news":{...}}
  */
  public function sendCustomMessage($data){
  $token = $this->getToken();
  if (empty($token)) return false;
  $url = 'https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token=%s';
  $url = sprintf($url,$token);
  $result = $this->http_post($url,self::json_encode($data));
  if ($result)
  {
  $json = json_decode($result,true);
  if (!$json || !empty($json['errcode'])) {
  $this->errCode = $json['errcode'];
  $this->errMsg = $json['errmsg'];
  return false;
  }
  return $json;
  }
  return false;
  }

/**

• 发送模板消息
• @param unknown $data
• @return boolean|unknown
  */
  public function sendTemplateMessage($data){
  $token = $this->getToken();
  if (empty($token)) return false;
  $url = "https://api.weixin.qq.com/cgi-bin/message/template/send?access_token=%s";
  $url = sprintf($url,true);
  if (!$json || !empty($json['errcode'])) {
  $this->errCode = $json['errcode'];
  $this->errMsg = $json['errmsg'];
  return false;
  }
  return $json;
  }
  return false;
  }

public function getFileCache($name){
return S($name);
}

/**

• 微信api不支持中文转义的json结构
• @param array $arr
  /
  static function json_encode($arr) {
  $parts = array ();
  $is_list = false;
  //Find out if the given array is a numerical array
  $keys = array_keys ( $arr );
  $max_length = count ( $arr ) - 1;
  if (($keys [0] === 0) && ($keys [$max_length] === $max_length )) { //See if the first key is 0 and last key is length - 1
  $is_list = true;
  for($i = 0; $i < count ( $keys ); $i ++) { //See if each key correspondes to its position
  if ($i != $keys [$i]) { //A key fails at position check.
  $is_list = false; //It is an associative array.
  break;
  }
  }
  }
  foreach ( $arr as $key => $value ) {
  if (is_array ( $value )) { //Custom handling for arrays
  if ($is_list)
  $parts [] = self::json_encode ( $value ); / :RECURSION: /
  else
  $parts [] = '"' . $key . '":' . self::json_encode ( $value ); / :RECURSION: */
  } else {
  $str = '';
  if (! $is_list)
  $str = '"' . $key . '":';
  //Custom handling for multiple data types
  if (!is_string ( $value ) && is_numeric ( $value ) && $value<2000000000)
  $str .= $value; //Numbers
  elseif ($value === false)
  $str .= 'false'; //The booleans
  elseif ($value === true)
  $str .= 'true';
  else
  $str .= '"' . addslashes ( $value ) . '"'; //All other things
  // :TODO: Is there any more datatype we should be in the lookout for? (Object?)
  $parts [] = $str;
  }
  }
  $json = implode ( ',',$parts );
  if ($is_list)
  return '[' . $json . ']'; //Return numerical JSON
  return '{' . $json . '}'; //Return associative JSON
  }

/**
+----------------------------------------------------------

• 生成随机字符串
  +----------------------------------------------------------
• @param int $length 要生成的随机字符串长度
• @param string $type 随机码类型：0，数字+大小写字母；1，数字；2，小写字母；3，大写字母；4，特殊字符；-1，数字+大小写字母+特殊字符
  +----------------------------------------------------------
• @return string
  +----------------------------------------------------------
  /
  static public function randCode($length = 5,$type = 2){
  $arr = array(1 => "0123456789",2 => "abcdefghijklmnopqrstuvwxyz",3 => "ABCDEFGHIJKLMNOPQRSTUVWXYZ",4 => "~@#$%^&(){}[]|");
  if ($type == 0) {
  array_pop($arr);
  $string = implode("",$arr);
  } elseif ($type == "-1") {
  $string = implode("",$arr);
  } else {
  $string = $arr[$type];
  }
  $count = strlen($string) - 1;
  $code = '';
  for ($i = 0; $i < $length; $i++) {
  $code .= $string[rand(0,$count)];
  }
  return $code;
  }

/**

• GET 请求
• @param string $url
  */
  private function http_get($url){
  $oCurl = curl_init();
  if(stripos($url,"https://")!==FALSE){
  curl_setopt($oCurl,CURLOPT_SSL_VERIFYPEER,FALSE);
  curl_setopt($oCurl,CURLOPT_SSL_VERIFYHOST,CURLOPT_SSLVERSION,1); //CURL_SSLVERSION_TLSv1
  }
  curl_setopt($oCurl,CURLOPT_URL,$url);
  curl_setopt($oCurl,CURLOPT_RETURNTRANSFER,1 );
  $sContent = curl_exec($oCurl);
  $aStatus = curl_getinfo($oCurl);
  curl_close($oCurl);
  if(intval($aStatus["http_code"])==200){
  return $sContent;
  }else{
  return false;
  }
  }

/**

• POST 请求
• @param string $url
• @param array $param
• @param boolean $post_file 是否文件上传
• @return string content
  */
  private function http_post($url,$param,$post_file=false){
  $oCurl = curl_init();
  if(stripos($url,false);
  curl_setopt($oCurl,1); //CURL_SSLVERSION_TLSv1
  }
  if (is_string($param) || $post_file) {
  $strPOST = $param;
  } else {
  $aPOST = array();
  foreach($param as $key=>$val){
  $aPOST[] = $key."=".urlencode($val);
  }
  $strPOST = join("&",$aPOST);
  }
  curl_setopt($oCurl,1 );
  curl_setopt($oCurl,CURLOPT_POST,true);
  curl_setopt($oCurl,CURLOPT_POSTFIELDS,$strPOST);
  $sContent = curl_exec($oCurl);
  $aStatus = curl_getinfo($oCurl);
  curl_close($oCurl);
  if(intval($aStatus["http_code"])==200){
  return $sContent;
  }else{
  return false;
  }
  }
  }

public function index(){
//①、获取用户openid
$tools = new \JsApiPay();
$openId = $tools->GetOpenid();
//②、统一下单
$input = new \WxPayUnifiedOrder();
//商品描述
$input->SetBody($this->_order_body);
//附加数据，可以添加自己需要的数据，微信回异步回调时会附加这个数据
$input->SetAttach('xxx');
//商户订单号
$out_trade_no = \WxPayConfig::MCHID.date("YmdHis");
$input->SetOut_trade_no($out_trade_no);
//总金额,订单总金额，只能为整数,单位为分
$input->SetTotal_fee(1);
//交易起始时间
$input->SetTime_start(date("YmdHis"));
//交易结束时间
$input->SetTime_expire(date("YmdHis",time() + 600));
//商品标记
$input->SetGoods_tag($this->_order_goods_tag);
//通知地址,接收微信支付异步通知回调地址 SITE_URL=http://test.paywechat.com/Charge
$notify_url = SITE_URL.'/index.PHP/Test/notify.html';
$input->SetNotify_url($notify_url);
//交易类型
$input->SetTrade_type("JSAPI");
$input->SetOpenid($openId);
$order = \WxPayApi::unifiedOrder($input);
$jsApiParameters = $tools->GetJsApiParameters($order);
//获取共享收货地址js函数参数
$editAddress = $tools->GetEditAddressParameters();

$this->assign('openId',$openId);
$this->assign('jsApiParameters',$jsApiParameters);
$this->assign('editAddress',$editAddress);
$this->display();
}

/**

• 异步通知回调方法
  */
  public function notify(){
  require_once ROOT_PATH."Api/lib/notify.PHP";
  $notify = new \PayNotifyCallBack();
  $notify->Handle(false);
  //这里的IsSuccess是我自定义的一个方法，后面我会贴出这个文件的代码，供参考。
  $is_success = $notify->IsSuccess();
  $bdata = $is_success['data'];
  //支付成功
  if($is_success['code'] == 1){
  $news = array(
  'touser' => $bdata['openid'],'msgtype' => 'news','news' => array (
  'articles'=> array (
  array(
  'title' => '订单支付成功','description' => "支付金额：{$bdata['total_fee']}\n".
  "微信订单号：{$bdata['transaction_id']}\n"
  'picurl' => '','url' => ''
  )

)
)
);
//发送微信支付通知
$this->sendCustomMessage($news);
}else{//支付失败

}
}

/**

• 支付成功页面
• 不可靠的回调
  /
  public function ajax_PaySuccess(){
  //订单号
  $out_trade_no = I('post.out_trade_no');
  //支付金额
  $total_fee = I('post.total_fee');
  /相关逻辑处理*/

}