thinkPHP5实现微信支付（app端） - 好文

第一步：建立一个支付控制器pay.php，是由上个页面选择好支付方式之后确认支付后需要经过的控制器(这里选择的是微信支付),代码如下：

<?php namespace app\mobile\controller; use think\Controller; class Pay extends
Controller {public function pay_order() { $res = new OrderGoods(); //获取订单号
$where['id'] = input('post.order_sn'); $reoderSn = input('post.order_sn'); //
查询订单信息 $order_info = $res->where($where)->find(); //获取支付方式 $pay_type =
input('post.pay_type');//微信支付或者支付宝支付 //获取支付金额 $money = input('post.totle_sum');
//判断支付方式 switch ($pay_type) { case 'ali';//如果支付方式为支付宝支付 break; case 'wx'; $type
['pay_type'] = 'wx';//更新支付方式为微信 $res->where($where)->update($type); $wx = new
Wxpay();//实例化微信支付控制器 $body = '订单号' . $order_info;//支付说明 $out_trade_no =
$reoderSn;//订单号 $total_fee = $money * 100;//支付金额(乘以100) $notify_url = '';//回调地址
$order = $wx->getPrePayOrder($body, $out_trade_no, $total_fee, $notify_url);//
调用微信支付的方法 if ($order['prepay_id']){//判断返回参数中是否有prepay_id $order1 = $wx
->getOrder($order['prepay_id']);//执行二次签名返回参数 echo json_encode(array('status' =>
1, 'prepay_order' => no_null($order1))); } else { echo json_encode(array
('status' => 0, 'msg' =>$order['err_code_des'])); } break; } } }
然后创建微信支付控制器了。命名为wx.php，用于执行微信支付,代码如下：

<?php namespace app\mobile\controller; use think\Controller; use think\Db;
class WxPay extends Controller{ /* 配置参数 */ private $config = array( 'appid' =>
"",//"wxcf1dded808489e2c", /*微信开放平台上的应用id*/ 'mch_id' => "",//"1440493402",
/*微信申请成功之后邮件中的商户id*/ 'api_key' => "" /*在微信商户平台上自己设定的api密钥 32位*/ ); //获取预支付订单
public function getPrePayOrder($body, $out_trade_no, $total_fee, $notify_url){
$url = "https://api.mch.weixin.qq.com/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, false); $data["sign"] = $s; $xml = $this->arrayToXml($data); $response =
$this->postXmlCurl($xml, $url); //将微信返回的结果xml转成数组 // return
$this->xmlstr_to_array($response); return 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,
false); $data["sign"] = $s; return $data; } /* 生成签名 */ function getSign($Obj) {
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(
$Parameters, false); //echo "【string】 =".$String."</br>"; //签名步骤二：在string后加入KEY
$String = $String."&key=".$this->config['api_key']; // echo "<textarea
style='width: 50%; height: 150px;'>$String</textarea> <br />"; //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) { $xml = "<xml>"; foreach ($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 if($data) {
curl_close($ch); return $data; } else { $error = curl_errno($ch); echo
"curl出错，错误码:$error"."<br>"; echo "<a
href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";
curl_close($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 . "&"; }
$reqPar; if (strlen($buff) > 0) { $reqPar = substr($buff, 0, strlen($buff)-1); }
return $reqPar; } /** xml转成数组 */ // function xmlstr_to_array($xmlstr) { // $doc
= new DOMDocument(); // $doc->loadXML($xmlstr); // return
$this->domnode_to_array($doc->documentElement); // } function domnode_to_array(
$node) { $output = array(); switch ($node->nodeType) { case
XML_CDATA_SECTION_NODE:case XML_TEXT_NODE: $output = trim($node->textContent);
break; 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)) { 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; } }
微信支付控制器里面基本不用动，只需要改几个参数就行了。很简单。流程已经没了，执行一下程序，看一下返回给前端的参数示例：

原创：http://www.cnblogs.com/luokakale/p/8391580.html

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