如何用PHP实现微信支付对账单查询

$url = 'https://api.mch.weixin.qq.com/pay/downloadbill';
$params = array(
  'appid' => 'xxx',
  'mch_id' => 'xxx',
  'nonce_str' => 'xxx',
  'sign' => 'xxx',
  'bill_date' => 'xxx', // 对账单日期
  'bill_type' => 'ALL', // ALL-返回当日所有订单信息，SUCCESS-返回当日成功支付的订单，REFUND-返回当日退款订单，REVOKED-已撤销或已退款的订单
);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($params));
$response = curl_exec($ch);
curl_close($ch);

$lines = explode("
", $response);
$header = explode(",", $lines[0]); // 第一行为表头信息
$data = array();
for($i = 1; $i < count($lines)-2; $i++) { // 最后两行为统计信息，不需要处理
  $line = explode(",", $lines[$i]);
  $row = array();
  foreach ($header as $key => $value) {
    $row[$value] = $line[$key];
  }
  $data[] = $row;
}

$grouped_data = array();
foreach ($data as $row) {
  $grouped_data[$row['商户订单号']][] = $row;
}

$result = array();
foreach ($grouped_data as $order_no => $order_lines) {
  $success_lines = array_filter($order_lines, function($line) {
     return $line['交易状态'] == 'SUCCESS';
  });
  if (count($success_lines) == 0) {
    $result[] = array(
      'order_no' => $order_no,
      'reconciliation_status' => 'fail',
      'transaction_type' => $order_lines[0]['交易类型'],
      'transaction_status' => $order_lines[0]['交易状态'],
      'total_amount' => $order_lines[0]['应结订单金额'],
      'refund_amount' => $order_lines[0]['已退款金额'],
      'fee' => $order_lines[0]['手续费'],
    );
  } else {
    $success_line = $success_lines[0];
    $total_amount = array_sum(array_column($order_lines, '应结订单金额'));
    $refund_amount = array_sum(array_column($order_lines, '已退款金额'));
    $fee = array_sum(array_column($order_lines, '手续费'));
    $result[] = array(
      'order_no' => $order_no,
      'reconciliation_status' => 'success',
      'transaction_type' => $success_line['交易类型'],
      'transaction_status' => $success_line['交易状态'],
      'total_amount' => $total_amount,
      'refund_amount' => $refund_amount,
      'fee' => $fee,
    );
  }
}

// 输出结果到HTML页面上
echo "<table>";
echo "<tr><td>订单号</td><td>对账状态</td><td>交易类型</td><td>交易状态</td><td>总金额</td><td>退款金额</td><td>手续费</td></tr>"
foreach ($result as $row) {
  echo "<tr>";
  echo "<td>{$row['order_no']}</td>";
  echo "<td>{$row['reconciliation_status']}</td>";
  echo "<td>{$row['transaction_type']}</td>";
  echo "<td>{$row['transaction_status']}</td>";
  echo "<td>{$row['total_amount']}</td>";
  echo "<td>{$row['refund_amount']}</td>";
  echo "<td>{$row['fee']}</td>";
  echo "</tr>";
}
echo "</table>";