CSV文件创建和下载无法在使用PHP的服务器上运行

Question

I want to create CSV file and download it on server.It is working well on local server but it is printing data on live server and there is no option to download the file. here is the code

<?php 
    // output headers so that the file is downloaded rather than displayed
    header('Content-Type: application/csv; charset=utf-8');
    header('Content-Disposition: attachment; filename=data.csv');
    ob_start();
    // create a file pointer connected to the output stream
    $output = fopen('php://output', 'w');

    // output the column headings
    fputcsv($output, array('Id', 'Emp Name', 'Department','Job Number','REG (hours)','OT1 (hours)','OT2','VAC','SIC','HOL','INPUT'));

    $from_date = $_REQUEST['from_date'];
    $to_date = $_REQUEST['to_date'];
    $class = $_REQUEST['class'];
    $job = $_REQUEST['job'];
    $str = '';
    if ($class!='') {
        $str.= " AND class='".$class."'";
    }
    if ($job!='') {
        $str.= " AND  job_number ='".$job."'";
    }
     $sql = "SELECT * FROM table WHERE punch_in_time BETWEEN '".$from_date."' AND '".$to_date."' $str";
    $res = mysql_query($sql,$Link);

    $weekfrom = array();
    $weekto = array();
    $start_date = date('Y-m-d', strtotime($from_date));
    $end_date = date('Y-m-d', strtotime($to_date));
    $end_date1 = date('Y-m-d', strtotime($to_date . '+ 6 days'));

    for ($date = $start_date; $date <= $end_date1; $date = date('Y-m-d', strtotime($date . ' + 14 days'))) {

      $week = date('W', strtotime($date));
      $year = date('Y', strtotime($date));
      $from = date("Y-m-d", strtotime("{$year}-W{$week}+1 - 1 day")); //Returns the date of monday in week
      if ($from < $start_date)
        $from = $start_date;
      $to = date("Y-m-d", strtotime("{$year}-W{$week}-6 + 1 week"));   //Returns the date of sunday in week
      if ($to > $end_date) {
        $to = $end_date;
      }
      if ($from < $to) {
        array_push($weekfrom, $from);
        array_push($weekto, $to);
      }
    }
    $n = count($weekfrom);
    for ($i = 0; $i < $n; $i++) {
      $week_start[$i] = $weekfrom[$i];
      $week_end[$i] = $weekto[$i] . "\n";
    }

    $num = mysql_num_rows($res);
    $k=1;
    if ($num > 0) {
    // loop over the rows, outputting them
        while ($row = mysql_fetch_array($res)) {
         $classname = 'testClass';
         $empname =    '11233';

          $total_punched_hours = 10;

             $arr = array($k,$empname,$classname,$row['job_number'],$total_punched_hours,'15','1','5','4','55','44');
             $result = fputcsv($output, $arr); 
             $k++;
        }

    }
    fclose($output);

?>

Answer 1

使用页面顶部的ob_start（）确实解决了这个问题，希望对其他用户也有帮助。