app⽀付完整代码
class WxPay
{
/*
配置参数
*/
private $config = array(
'appid' => "", /*开放平台上的应⽤id*/
'mch_id' => "", /*申请成功之后邮件中的商户id*/
'api_key' => ""/*在商户平台上⾃⼰设定的api密钥 32位*/
);
/
/获取预⽀付订单
public function getPrePayOrder($body, $out_trade_no, $total_fee, $notify_url)
{
$url = "h.weixin.qq/pay/unifiedorder";
$onoce_str = $this->getRandChar(32);
$data["appid"]=$this->config["appid"];
$data["body"]=$body;
$data["mch_id"]=$this->config['mch_id'];
$data["nonce_str"] =onoce_str;
$data["notify_url"] =$notify_url;
$data["out_trade_no"] =$out_trade_no;
$data["spbill_create_ip"] =$this->get_client_ip();
$data["total_fee"] =$total_fee;
$data["trade_type"] ="APP";
$s = $this->getSign($data,$this->config["api_key"]);
$data["sign"] =$s;
$xml = $this->arrayToXml($data);
$response = $this->postXmlCurl($xml, $url);
//将返回的结果xml转成数组
return $this->xmlToArray($response);
}
//执⾏第⼆次签名，才能返回给客户端使⽤
public function getOrder($prepayId)
{
$data["appid"] = $this->config["appid"];
$data["noncestr"] = $this->getRandChar(32);;
$data["package"] = "Sign=WXPay";
$data["partnerid"] = $this->config['mch_id'];
$data["prepayid"] = $prepayId;
$data["timestamp"] = time();
$s = $this->getSign($data, $this->config["api_key"]);
$data["sign"] = $s;
return $data;
}
/*
⽣成签名
*/
function getSign($obj, $api_key)
{
foreach ($obj as $k => $v)
{
$Parameters[strtolower($k)] = $v;
}
//签名步骤⼀：按字典序排序参数
ksort($Parameters);
$String = $this->formatBizQueryParaMap($Parameters, false);
//签名步骤⼆：在string后加⼊KEY
$String = $String."&key=".$api_key;
//签名步骤三：MD5加密
$result = strtoupper(md5($String));
return $result;
}
//获取指定长度的随机字符串
function getRandChar($length)
{
$str = null;
$strPol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
$max = strlen($strPol) - 1;
for ($i = 0; $i < $length; $i++) {
$str .= $strPol[rand(0, $max)];//rand($min,$max)⽣成介于min和max两个数之间的⼀个随机整数        }
return $str;
}
//数组转xml
function arrayToXml($arr)
{
if(!is_array($arr)|| count($arr) <= 0)
{
return false;
}
$xml = "<xml>";
foreach ($arr as $key=>$val)
{
if (is_numeric($val)){
$xml.="<".$key.">".$val."</".$key.">";
}else{
$xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
}
}
$xml.="</xml>";
return $xml;
}
//post https请求，CURLOPT_POSTFIELDS xml格式
function postXmlCurl($xml, $url, $second = 30)
{
//初始化curl
$ch = curl_init();
//超时时间
curl_setopt($ch, CURLOPT_TIMEOUT, $second);
/
/这⾥设置代理，如果有的话
//curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
//curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
//设置header
curl_setopt($ch, CURLOPT_HEADER, FALSE);
//要求结果为字符串且输出到屏幕上
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
//post提交⽅式
curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
//运⾏curl
$data = curl_exec($ch);
//返回结果
curl_close($ch);
return $data;
} else {
$error = curl_errno($ch);
echo "curl出错，错误码:$error" . "<br>";
echo "<a href='curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";
curl_close($ch);
return false;
}
}
/*
获取当前服务器的IP
*/
function get_client_ip()
{
if ($_SERVER['REMOTE_ADDR']) {
$cip = $_SERVER['REMOTE_ADDR'];
} elseif (getenv("REMOTE_ADDR")) {
$cip = getenv("REMOTE_ADDR");
} elseif (getenv("HTTP_CLIENT_IP")) {
$cip = getenv("HTTP_CLIENT_IP");
} else {
$cip = "unknown";
}
return $cip;
}
//将数组转成uri字符串
function formatBizQueryParaMap($paraMap, $urlencode)
{
$buff = "";
ksort($paraMap);
foreach ($paraMap as $k => $v) {
if ($urlencode) {
$v = urlencode($v);
}
$buff .= strtolower($k) . "=" . $v . "&";
}
if (strlen($buff) > 0) {
$reqPar = substr($buff, 0, strlen($buff) - 1);
}
return $reqPar;
}
/* XML转数组
* @param unknown $xml
* @return mixed
*/
function xmlToArray($xml)
{
//将XML转为array
$array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);        return $array_data;
}
function domnode_to_array($node)
{
$output = array();
switch ($node->nodeType) {
case XML_CDATA_SECTION_NODE:
case XML_TEXT_NODE:
$output = trim($node->textContent);
case XML_ELEMENT_NODE:
for ($i = 0, $m = $node->childNodes->length; $i < $m; $i++) {                    $child = $node->childNodes->item($i);
$v = $this->domnode_to_array($child);
if (isset($child->tagName)) {
$t = $child->tagName;
if (!isset($output[$t])) {
$output[$t] = array();
}
$output[$t][] = $v;
} elseif ($v) {
$output = (string)$v;
}
}
if (is_array($output)) {
代码转换
if ($node->attributes->length) {
$a = array();
foreach ($node->attributes as $attrName => $attrNode) {                            $a[$attrName] = (string)$attrNode->value;
}
$output['@attributes'] = $a;
}
foreach ($output as $t => $v) {
if (is_array($v) && count($v) == 1 && $t != '@attributes') {                            $output[$t] = $v[0];
}
}
}
break;
}
return $output;
}

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