PHP AJAX获取未定义的索引ID，尝试了许多方法无法解决它

Question

I'm making an click event in which I send the id of the employee. I can see the value using console.log(); the employee id is getting shown, but I keep getting an index :id error.

<input type="button" class="btn btn-primary" value="Appointment Letter" onclick="downloadempappointmentletter('<?php echo $data->employee_id;?>')">

function downloadempappointmentletter(id) {
  $.ajax({
    type: 'POST',
    url: "<?php echo base_url(); ?>Admin/Employee/downloadappointmentletter",
    data: { id: id },
    success: function (data) {
      console.log(data);
    }
  });
}

public function downloadappointmentletter()
{
  $empid = $_POST['id'];
}

I keep getting error:

undefined index :id

However when I echo $data->employee_id; it shows 1 etc. What am I missing?

Answer 1

You just comment $empid = $_POST['id']; this line and var_dump($_POST); it will shows all $_POST values from ajax

look through browser Network tab ,check ajax post id or not after that we can follow up the problem