如何从 MySQL 数据库中的表的列中导出 .txt 文件？

Question

我想逐行导出 .txt 格式的电话号码。表名是customers 列名是customer_contact_numbers 来自数据库saiautocare 我使用的是Laravel 框架、JQuery 和MySQL 数据库。

当我单击该按钮时，它会询问我将文件保存在哪里并将数字逐行导出到文本文件中。

代码如下：

      <div class="col-sm-6 col-lg-3">
    <div class="card text-white bg-primary">
      <div class="card-body pb-0">
        <div class="btn-group float-right">
          <button type="button" class="btn btn-transparent dropdown-toggle p-0" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
            <i class="icon-settings"></i>
          </button>
          <div class="dropdown-menu dropdown-menu-right">
            <a class="dropdown-item" href="#">Export to TXT</a>
          </div>
        </div>
        <h4 class="mb-0">{{ $TotalCustomers }}</h4> 
        <p>Marketing Numbers</p>
      </div>
      <div class="chart-wrapper px-3" style="height:70px;">
        <canvas id="card-chart1" class="chart" height="70"></canvas>
      </div>
    </div>
  </div>

我是 PHP 和 MySQL 的新手，如果我不能提供所有必需的信息，我很抱歉。

Answer 1

$customers = Customer::all();
$phoneNumbers = "Phone numbers \n";
foreach ($customers as  $customer) {
  $content .= $customer->customer_contact_numbers;
  $content .= "\n";
}

// file name to download
$fileName = "contact_numbers.txt";

// make a response, with the content, a 200 response code and the headers
return Response::make($content, 200, [
  'Content-type' => 'text/plain', 
  'Content-Disposition' => sprintf('attachment; filename="%s"', $fileName),
  'Content-Length' => sizeof($content)
];);