php实现微信原生支付（扫码支付）功能

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：

代码如下：

<?php
header('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。