网上的很多PHP微信扫码支付接入教程都颇为复杂，且需要配置和引入较多的文件，本人通过整理后给出一个单文件版的，只有200行代码，希望可以给各位想接入微信扫码支付的带来些许帮助和借鉴意义。
直接运行该文件即可得到一个支付二维码的图片。
需要注意的事项：
1.该文件需放到支付授权目录下，可以在微信支付商户平台->产品中心->开发配置中设置。 2.如提示签名错误可以通过微信支付签名验证工具进行验证：微信公众平台支付接口调试工具
代码如下：
<?phpheader("Content-type:text/html; Charset=utf-8");$mchid = "xxxxx"; //微信支付商户号 PartnerID 通过微信支付商户资料审核后邮件发送$appid = "xxxxx"; //公众号APPID 通过微信支付商户资料审核后邮件发送$apiKey = "xxxxx"; //https://pay.weixin.qq.com 帐户设置-安全设置-API安全-API密钥-设置API密钥$wxPay = new WxpayService($mchid,$appid,$apiKey);$outTradeNo = uniqid(); //你自己的商品订单号$payAmount = 0.01; //付款金额，单位:元$orderName = "支付测试"; //订单标题$notifyUrl = "https://www.xxx.com/wx/"; //付款成功后的回调地址(不要有问号)$payTime = time(); //付款时间$arr = $wxPay->createJsBizPackage($payAmount,$outTradeNo,$orderName,$notifyUrl,$payTime);//生成二维码$url = "http://qr.liantu.com/api.php?text=".$arr["code_url"];echo "<img src="{$url}" style="width:300px;">";class WxpayService{ protected $mchid; protected $appid; protected $apiKey; public function __construct($mchid, $appid, $key) { $this->mchid = $mchid; $this->appid = $appid; $this->apiKey = $key; } /** * 发起订单 * @param float $totalFee 收款总费用 单位元 * @param string $outTradeNo 唯一的订单号 * @param string $orderName 订单名称 * @param string $notifyUrl 支付结果通知url 不要有问号 * @param string $timestamp 订单发起时间 * @return array */ public function createJsBizPackage($totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp) { $config = array( "mch_id" => $this->mchid, "appid" => $this->appid, "key" => $this->apiKey, ); $orderName = iconv("GBK","UTF-8",$orderName); $unified = array( "appid" => $config["appid"], "attach" => "pay", //商家数据包，原样返回，如果填写中文，请注意转换为utf-8 "body" => $orderName, "mch_id" => $config["mch_id"], "nonce_str" => self::createNonceStr(), "notify_url" => $notifyUrl, "out_trade_no" => $outTradeNo, "spbill_create_ip" => "127.0.0.1", "total_fee" => intval($totalFee * 100), //单位 转为分 "trade_type" => "NATIVE", ); $unified["sign"] = self::getSign($unified, $config["key"]); $responseXml = self::curlPost("https://api.mch.weixin.qq.com/pay/unifiedorder", self::arrayToXml($unified)); $unifiedOrder = simplexml_load_string($responseXml, "SimpleXMLElement", LIBXML_NOCDATA); if ($unifiedOrder === false) { die("parse xml error"); } if ($unifiedOrder->return_code != "SUCCESS") { die($unifiedOrder->return_msg); } if ($unifiedOrder->result_code != "SUCCESS") { die($unifiedOrder->err_code); } $codeUrl = (array)($unifiedOrder->code_url); if(!$codeUrl[0]) exit("get code_url error"); $arr = array( "appId" => $config["appid"], "timeStamp" => $timestamp, "nonceStr" => self::createNonceStr(), "package" => "prepay_id=" . $unifiedOrder->prepay_id, "signType" => "MD5", "code_url" => $codeUrl[0], ); $arr["paySign"] = self::getSign($arr, $config["key"]); return $arr; } public function notify() { $config = array( "mch_id" => $this->mchid, "appid" => $this->appid, "key" => $this->apiKey, ); $postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; $postObj = simplexml_load_string($postStr, "SimpleXMLElement", LIBXML_NOCDATA); if ($postObj === false) { die("parse xml error"); } if ($postObj->return_code != "SUCCESS") { die($postObj->return_msg); } if ($postObj->result_code != "SUCCESS") { die($postObj->err_code); } $arr = (array)$postObj; unset($arr["sign"]); if (self::getSign($arr, $config["key"]) == $postObj->sign) { echo "<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>"; return $postObj; } } /** * curl get * * @param string $url * @param array $options * @return mixed */ public static function curlGet($url = "", $options = array()) { $ch = curl_init($url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_TIMEOUT, 30); if (!empty($options)) { curl_setopt_array($ch, $options); } //https请求 不验证证书和host curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); $data = curl_exec($ch); curl_close($ch); return $data; } public static function curlPost($url = "", $postData = "", $options = array()) { if (is_array($postData)) { $postData = http_build_query($postData); } $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, $postData); curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置cURL允许执行的最长秒数 if (!empty($options)) { curl_setopt_array($ch, $options); } //https请求 不验证证书和host curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); $data = curl_exec($ch); curl_close($ch); return $data; } public static function createNonceStr($length = 16) { $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; $str = ""; for ($i = 0; $i < $length; $i++) { $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); } return $str; } public static function arrayToXml($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 $xml; } /** * 获取签名 */ public static function getSign($params, $key) { ksort($params, SORT_STRING); $unSignParaString = self::formatQueryParaMap($params, false); $signStr = strtoupper(md5($unSignParaString . "&key=" . $key)); return $signStr; } protected static function formatQueryParaMap($paraMap, $urlEncode = false) { $buff = ""; ksort($paraMap); foreach ($paraMap as $k => $v) { if (null != $v && "null" != $v) { if ($urlEncode) { $v = urlencode($v); } $buff .= $k . "=" . $v . "&"; } } $reqPar = ""; if (strlen($buff) > 0) { $reqPar = substr($buff, 0, strlen($buff) - 1); } return $reqPar; }}github下载地址：weixinPay
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持网页设计。
