怎么样使用php版微信js-sdk支付接口？

<?php
if (isset($argc) && $argc >= 1 && $argv[0] == __FILE__) {
 //初始化pay的必要信息
 $pay = new WechatPay(array(
  WechatPay::APPID => 'wx99dabzpiuq83985b8',
  WechatPay::APPSERCER => 'ac12e7e4abaer63hkoa0cc36a9663fa',
  WechatPay::PARTNERKEY => 'bae4sfa3562rsfaq23s2045',
  WechatPay::PARTNERID => '1268969802',
  WechatPay::PAYSIGNKEY => '9Fqsxb3PK4IVOCEc4yCquy5zecS9LeeMjF2Nn4B4YKoOxPwaQdFwMezKT8oNlBYaWcuT',
  WechatPay::SIGNTYPE => 'sha1',
 ));
 //设置package 必要的参数 jsapi native都通用
 $pay->setParams(WechatPay::BANK_TYPE, "WX");
 $pay->setParams(WechatPay::BODY, "test");
 $pay->setParams(WechatPay::PARTNER, $pay->partnerid);
 $pay->setParams(WechatPay::OUT_TRADE_NO, commonUtil::createNoncestr());
 $pay->setParams(WechatPay::TOTAL_FEE, "1");
 $pay->setParams(WechatPay::FEE_TYPE, "1");
 $pay->setParams(WechatPay::TIMESTAMP, time());
 $pay->setParams(WechatPay::NOTIFY_URL, "http://www.demo.com/notify");
 $pay->setParams(WechatPay::SPBILL_CREATE_IP, "127.0.0.1");
 $pay->setParams(WechatPay::INPUT_CHARSET, "UTF-8");
 //JSAPI的签名json
 print_r($pay->createJsApiPackage());
 //生成native XML
 print_r($pay->createNativePackage());
 //生成native URL
 print_r($pay->createNativeUrl("9701"));
}

{
 "appId":"wx9998ff5f4dede5b7",
 "package":"bank_type=WX&body=test&fee_type=1&input_charset=UTF-8¬ify_url=http%3A%2F%2Fwww.demo.com%2Fnotify&out_trade_no=Vf5qsSwtu0hc2loH&partner=wx9998ff5f4dede5b7&spbill_create_ip=127.0.0.1×tamp=1409295711&total_fee=1&sign=FEE0167BD0D89A88BF6850590EA889B6",
 "timeStamp":1409295711,
 "nonceStr":"Vf5qsSwtu0hc2loH",
 "paySign":"f816264c750923863c370a1739640244b0c2d39c",
 "signType":"sha1"
}

<xml>
 <AppId><![CDATA[wx9998ff5f4dede5b7]]></AppId>
 <Package>
  <![CDATA[bank_type=WX&body=test&fee_type=1&input_charset=UTF-8¬ify_url=http%3A%2F%2Fwww.demo.com%2Fnotify&out_trade_no=GDl3what4sALDEAd&partner=wx9998ff5f4dede5b7&spbill_create_ip=127.0.0.1×tamp=1409296124&total_fee=1&sign=BF949B85570644B939B369FD44B0C4A9]]>
 </Package>
 <TimeStamp>1409296124</TimeStamp>
 <NonceStr><![CDATA[GDl3what4sALDEAd]]></NonceStr>
 <RetCode>0</RetCode>
 <RetErrMsg><![CDATA[ok]]></RetErrMsg>
 <AppSignature><![CDATA[ca4a2467b817a62c38a9801fcf451f51692027bf]]></AppSignature>
 <SignMethod><![CDATA[sha1]]></SignMethod>
</xml>

<?php
class WechatPay {
 const
  BANK_TYPE = 'bank_type',
  BODY = 'body',
  PARTNER = 'partner',
  OUT_TRADE_NO = 'out_trade_no',
  TIMESTAMP = 'timestamp',
  TOTAL_FEE = 'total_fee',
  FEE_TYPE = 'fee_type',
  NOTIFY_URL = 'notify_url',
  SPBILL_CREATE_IP = 'spbill_create_ip',
  INPUT_CHARSET = 'input_charset',
  APPID = 'appid',
  APPSERCER = 'appsercer',
  PAYSIGNKEY = 'appkey',
  PARTNERID = 'partnerid',
  PARTNERKEY = 'partnerkey',
  SIGNTYPE = 'signtype';
 public
  $params = array(), $partnerid = '';
 static protected
  $_instance;
 protected
  $_appid, $_appkey, $_signtype, $_partnerkey, $_appsercer;
 static public function getInstance(array $options = array()) {
  if (empty(self::$_instance)) {
   self::$_instance = new self ($options);
  }
  return self::$_instance;
 }
 public function __construct(array $options = array()){
  $this->_appid = $options[self::APPID];
  $this->_appkey = $options[self::PAYSIGNKEY];
  $this->_signtype = $options[self::SIGNTYPE];
  $this->_partnerkey = $options[self::PARTNERKEY];
  $this->_appsercer = $options[self::APPSERCER];
  $this->partnerid = $options[self::APPID];
 }
 public function setParams($param, $paramValue) {
  $this->params[CommonUtil::trimString($param)] = CommonUtil::trimString($paramValue);
 }
 public function getParams($param) {
  return $this->params[$param];
 }
 protected function createNoncestr( $length = 16 ) {
  $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  $str ="";
  for ( $i = 0; $i < $length; $i++ ) {
   $str.= substr($chars, mt_rand(0, strlen($chars)-1), 1);
  }
  return $str;
 }
 public function checkParams(){
  //必要的9个参与签名的参数
  if($this->params[self::BANK_TYPE] == null || $this->params[self::BODY] == null || $this->params[self::PARTNER] == null ||
   $this->params[self::OUT_TRADE_NO] == null || $this->params[self::TOTAL_FEE] == null || $this->params[self::FEE_TYPE] == null ||
   $this->params[self::NOTIFY_URL] == null || $this->params[self::SPBILL_CREATE_IP] == null || $this->params[self::INPUT_CHARSET] == null
  ) {
   return false;
  }
  return true;
 }
 /*
  * 生成package包
  * @params 初始化类时用setParams方法定义必要的9个参数
  * 排序后格式化url query形式 再md5SignUtil类签名，再给合URL
  */
 protected function getPackageSign(){
  try {
   if (null == $this->_partnerkey || "" == $this->_partnerkey ) {
    throw new Exception("密钥不能为空！" . "<br>");
   }
   $commonUtil = new CommonUtil();
   ksort($this->params);
   $unSignParaString = $commonUtil->formatUrlQuery($this->params, false);
   $paraString = $commonUtil->formatUrlQuery($this->params, true);
   $md5SignUtil = new MD5SignUtil();
   return $paraString . "&sign=" . $md5SignUtil->sign($unSignParaString,commonUtil::trimString($this->_partnerkey));
  } catch (Exception $e) {
   echo ($e->getMessage());
  }
 }
 /*
  * 生成签名方法
  * @params appid appkey package timestamp noncestr 等参数而native事例代码中加上retcode reterrmsg两个参数
  */
 public function getPaySign($signObj){
  foreach ($signObj as $k => $v){
   $signParams[strtolower($k)] = $v;
  }
  try {
   if ($this->_appkey == "") {
    throw new Exception("APPKEY为空！" . "<br>");
   }
   $signParams["appkey"] = $this->_appkey;
   ksort($signParams, SORT_STRING);
   $commonUtil = new CommonUtil();
   $signString = $commonUtil->formatPayUrlQuery($signParams, false);
   return sha1($signString);
  } catch (Exception $e) {
   echo ($e->getMessage());
  }
 }
 //JS API 签名 其中nonceStr是作为订单号 灌穿整个支付流程
 public function createJsApiPackage(){
  try {
   if($this->checkParams() == false) {
    throw new Exception("生成package参数缺失！" . "<br>");
   }
   $payObj["appId"] = $this->_appid;
   $payObj["package"] = $this->getPackageSign();
   $payObj["timeStamp"] = $this->getParams(self::TIMESTAMP);
   $payObj["nonceStr"] = $this->getParams(self::OUT_TRADE_NO);
   $payObj["paySign"] = $this->getPaySign($payObj);
   $payObj["signType"] = $this->_signtype;
   return json_encode($payObj);
  } catch (Exception $e) {
   die($e->getMessage());
  }
 }
 /*
  * 构建发货状态数组 主要三个参数openid transid orderid
  */
 public function createDeliverPost(Array $params) {
  $deliver = array();
  $deliver['appid'] = $this->_appid;
  $deliver['openid'] = $params['openid'];
  $deliver['transid'] = $params['transid'];
  $deliver['out_trade_no'] = $params['out_trade_no'];
  $deliver['deliver_timestamp'] = current_time('timestamp');
  $deliver['deliver_status'] = 1;
  $deliver['deliver_msg'] = 'OK';
  $deliver['app_signature'] = $this->getPaySign($deliver);
  $deliver['sign_method'] = 'sha1';
  return $deliver;
 }
 /*
  * 生成扫描或者点击原生URL后，响应的XML格式
  * @params $retcode $reterrmsg 定义该商品的状态
  */
 public function createNativePackage($retcode = 0, $reterrmsg = "ok") {
  try {
   if ($this->checkParams() == false && $retcode == 0) { //如果是正常的返回， 检查财付通的参数
    throw new Exception("生成package参数缺失！" . "<br>");
   }
   $nativeObj["AppId"] = $this->_appid;
   $nativeObj["Package"] = $this->getPackageSign();
   $nativeObj["TimeStamp"] = $this->getParams(self::TIMESTAMP);
   $nativeObj["NonceStr"] = $this->getParams(self::OUT_TRADE_NO);
   $nativeObj["RetCode"] = $retcode;
   $nativeObj["RetErrMsg"] = $reterrmsg;
   $nativeObj["AppSignature"] = $this->getPaySign($nativeObj);
   $nativeObj["SignMethod"] = $this->_signtype;
   $commonUtil = new CommonUtil();
   $xml = $commonUtil->arrayToXml($nativeObj);
   exit($xml);
  }catch (Exception $e) {
   echo ($e->getMessage());
  }
 }
 /*
  * 生成原生URL 以订单号为参数 这是灌穿整个支付流程
  */
 public function createNativeUrl($productid) {
  $commonUtil = new CommonUtil();
  $nativeObj["appid"] = $this->_appid;
  $nativeObj["productid"] = urlencode($productid);
  $nativeObj["timestamp"] = time();
  $nativeObj["nonceStr"] = commonUtil::createNoncestr();
  $nativeObj["sign"] = $this->getPaySign($nativeObj);
  $nativeString = $commonUtil->formatPayUrlQuery($nativeObj, false);
  return "weixin://wxpay/bizpayurl?".$nativeString;
 }
 /*
  * 取IP地址
  */
 public function getIp(){
  switch(true) {
   case !empty($_SERVER["HTTP_CLIENT_IP"]):
    $ip = $_SERVER["HTTP_CLIENT_IP"];
    break;
   case !empty($_SERVER["HTTP_X_FORWARDED_FOR"]):
    $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
    break;
   case !empty($_SERVER["REMOTE_ADDR"]):
    $ip = $_SERVER["REMOTE_ADDR"];
    break;
   default:
    $ip = "127.0.0.1";
  }
  return $ip;
 }
}
class MD5SignUtil {
 public function sign($content, $key) {
  try {
   if (null == $key) {
    throw new Exception("财付通签名key不能为空！" . "<br>");
   }
   if (null == $content) {
    throw new Exception("财付通签名内容不能为空" . "<br>");
   }
   $signStr = $content . "&key=" . $key;
   return strtoupper(md5($signStr));
  } catch (Exception $e) {
   echo ($e->getMessage());
  }
 }
 public static function verifySignature($content, $sign, $md5Key) {
  $signStr = $content . "&key=" . $md5Key;
  $calculateSign = strtolower(md5($signStr));
  $tenpaySign = strtolower($sign);
  return $calculateSign == $tenpaySign;
 }
}
class CommonUtil {
 public function genAllUrl($toURL, $paras) {
  $allUrl = null;
  if (null == $toURL) {
   die("toURL is null");
  }
  if (strripos($toURL,"?") =="") {
   $allUrl = $toURL . "?" . $paras;
  } else {
   $allUrl = $toURL . "&" . $paras;
  }
  return $allUrl;
 }
 //订单号，可根据实际自定义
 static public function createOrderNo() {
  $nonce = CommonUtil::createNoncestr(4);
  return strtoupper(date('ymds').substr(microtime(),2,4).$nonce);
 }
 //随机字符串
 static public function createNoncestr( $length = 16 ) {
  $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  $str ="";
  for ( $i = 0; $i < $length; $i++ ) {
   $str.= substr($chars, mt_rand(0, strlen($chars)-1), 1);
  }
  return $str;
 }
 public function splitParaStr($src, $token) {
  $resMap = array();
  $items = explode($token,$src);
  foreach ($items as $item){
   $paraAndValue = explode("=",$item);
   if ($paraAndValue != "") {
    $resMap[$paraAndValue[0]] = $paraAndValue[1];
   }
  }
  return $resMap;
 }
 static function trimString($value) {
  $ret = null;
  if (null != $value) {
   $ret = $value;
   if (strlen($ret) == 0) {
    $ret = null;
   }
  }
  return $ret;
 }
 public function formatUrlQuery($paraMap, $urlencode) {
  $buff = "";
  ksort($paraMap, SORT_STRING);
  foreach ($paraMap as $k => $v) {
   if (null != $v && "null" != $v && "sign" != $k) {
    if($urlencode) {
     $v = urlencode($v);
    }
    $buff .= $k . "=" . $v . "&";
   }
  }
  $reqPar = '';
  if (strlen($buff) > 0) {
   $reqPar = substr($buff, 0, strlen($buff)-1);
  }
  return $reqPar;
 }
 public function formatPayUrlQuery($paraMap, $urlencode) {
  $buff = "";
  ksort($paraMap, SORT_STRING);
  foreach ($paraMap as $k => $v) {
   if($urlencode){
    $v = urlencode($v);
   }
   $buff .= strtolower($k) . "=" . $v . "&";
  }
  $reqPar = '';
  if (strlen($buff) > 0) {
   $reqPar = substr($buff, 0, strlen($buff)-1);
  }
  return $reqPar;
 }
 /*
  * 输出一级数组的xml格式
  */
 public function arrayToXml($arr) {
  $xml = "<xml>";
  foreach ($arr as $key=>$val) {
   if ($key == 'TimeStamp' || $key == 'RetCode') {
    $xml.="<".$key.">".$val."</".$key.">";
   } else
    $xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
  }
  $xml .= "</xml>";
  return $xml;
 }
}