PHPExcel不使用php显示所有行

在excel工作表中，我无法显示表中的所有行。我的以下代码仅显示第一行

$sql="SELECT * FROM projects";
$result=mysqli_query($con,$sql);
$row = 1; 
while($row_data = $result->fetch_assoc()) {
    $col = 0;
    foreach($row_data as $key=>$value) {
        $objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow($col, $row, $value);
        $col++;
    }
    $row++;
}

---

尝试此操作，更改行和列变量

$sql="SELECT * FROM projects";
$result=mysqli_query($con,$sql);
$row = 1; 
while($row_data = $result->fetch_assoc()) {
  $col = 0;
  foreach($row_data as $key=>$value) {
    $objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow($col, $row, $value);
    $row++;
  }           
}