PHP接入微信H5支付的方法示例

  /**
   * 组建签名
   * @param array $params 请求参数
   * @param string $key 秘钥
   */
  public function genSign($params, $key)
  {
    foreach ($params as $k=>$v) {
      if (!$v) {
        unset($params[$k]);
      }
    }
    ksort($params);
    $paramStr = '';
    foreach ($params as $k => $v) {
      $paramStr = $paramStr . $k . '=' . $v . '&';
    }
    $paramStr = $paramStr . 'key='.$key;
    $sign = strtoupper(md5($paramStr));
    return $sign;
  }

  /**
   * 将数组转为XML
   * @param array $params 支付请求参数
   */
  public function array_to_xml($params)
  {
    if(!is_array($params)|| count($params) <= 0) {
      return false;
    }
    $xml = "";
    foreach ($params as $key=>$val) {
      if (is_numeric($val)) {
        $xml.="<".$key.">".$val."";
      } else {
        $xml.="<".$key.">";
      }
    }
    $xml.="";
    return $xml;
  }

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
    $return = curl_exec($ch);
    curl_close($ch);
    return $return;

  /**
   * 获取微信支付中间页deepLink参数
   * @param string $url 微信返回的mweb_url
   * @param string $ip 用户端IP
   */
  public function getDeeplink(string $url, string $ip)
  {
    $headers = array("X-FORWARDED-FOR:$ip", "CLIENT-IP:$ip");
    ob_start();
    $ch = curl_init();
    curl_setopt ($ch, CURLOPT_URL, $url);
    curl_setopt ($ch, CURLOPT_HTTPHEADER , $headers );
    curl_setopt ($ch, CURLOPT_REFERER, "pay.o9di.cn");
    curl_setopt( $ch, CURLOPT_HEADER, 1);
    curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Linux; Android 6.0.1; OPPO R11s Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36');
    curl_exec($ch);
    curl_close ($ch);
    $out = ob_get_contents();
    ob_clean();
    $a = preg_match('/weixin:\/\/wap.*/',$out, $str);
    if ($a) {
      return substr($str[0], 0, strlen($str[0])-1);
    } else {
      return '';
    }
  }