从DateTimePicker Bootstrap获取值

Question

How do i get the value of a calender from my ajax and send it to a php script. I've tried most of the other threads about this but nothing has worked.

This is my PHP script which spawns the picker:

$output_string .="<td id=\"start$count\">
";
$output_string .="<div class='input-group date'>
";
$output_string .="<input type='text' class=\"form-control\" id='datetimepicker$count'>
";
$output_string .="<span class=\"input-group-addon\">
";
$output_string .="<span class=\"glyphicon glyphicon-calendar\"></span>
";
$output_string .="</span>
";
$output_string .="</div>
";
$output_string .="</td>
";

Here is the AJAX i'm using to start off another PHP script:

<script type="text/javascript" language="javascript">
        $("#run1").click(function(){
        var filename = $("#filename1").text();
        var start_time = $("#datetimepicker1").datetimepicker("getDate");
            $.ajax({
                url: "launch.php",
                type:"POST",
                data: {"value1": filename, "value2":start_time},
                dataType: "json",
                success: function(responce){
                    $("#output").html(responce);
                    } // End of success function of ajax form
                }); // End of ajax call
            });
</script>

Edit:

I use loops to generate a table. In the table are datetimepickers. The PHP also generates the AJAX which send the value to launch.php. But for some reason the value of the datetimepicker is either nothing or "undefined".

Full PHP script:

<?php

include_once "connectdb.php";

$tbquery = "select * from case_in order by created_time DESC";
$results = mysqli_query($con, $tbquery);
    $output_string ="<table id=\"table\" class=\"table table-striped\"
";
    $output_string .="<thead>
";
    $output_string .="<tr>
";
    $output_string .="<th>File Name</th>
";
    $output_string .="<th>Created</th>
";
    $output_string .="<th>Start Time</th>
";
    $output_string .="<th></th>
";
    $output_string .="</tr>
";
    $output_string .="</thead>
";
    $output_string .="<tbody>
";
    $output_string .="<tr>
";
    $count = 0;
foreach ($results as $table) {
    $output_string .="<tr>
";
    $output_string .="<td id=\"filename$count\">$table[file_name]</td>
";
    $output_string .="<td id=\"created$count\">$table[created_time]</td>
";
    $output_string .="<td id=\"start$count\">
";
    $output_string .="<div class='input-group date'>
";
    $output_string .="<input type='text' class=\"form-control\" id='datetimepicker$count'>
";
    $output_string .="<span class=\"input-group-addon\">
";
    $output_string .="<span class=\"glyphicon glyphicon-calendar\"></span>
";
    $output_string .="</span>
";
    $output_string .="</div>
";
    $output_string .="</td>
";
    $output_string .="<td><button type=\"button\" class=\"btn\" id=\"run$count\">Run Job</button>
";
    $output_string .="</tr>
";
    $count++;
    }
    $output_string .="</tr>
";
    $output_string .="</tr>
";
    $output_string .="</tbody>
";
    $output_string .="</table>
";
    $output_string .="<br>";

$n = 0;
while ($n < $count) {
    $output_string .="<script type=\"text/javascript\" language=\"javascript\">
";
    $output_string .="$(\"#run$n\").click(function(){
";
    $output_string .="var filename = $(\"#filename$n\").text();
";
    $output_string .="var start_time = $(\"#datetimepicker$n\").val;
";
    $output_string .="$.ajax({
";
    $output_string .="url: \"launch.php\",
";
    $output_string .="type:\"POST\",
";
    $output_string .="data: {\"value1\": filename, \"value2\":start_time},
";
    $output_string .="dataType: \"json\",
";
    $output_string .="success: function(responce){
";
    $output_string .="$(\"#output\").html(responce);
";
    $output_string .="} // End of success function of ajax form
";
    $output_string .="}); // End of ajax call
";
    $output_string .="});
"; 
    $output_string .="</script>
";
    $output_string .="<script type=\"text/javascript\">
";
    $output_string .="$(document).ready(function() {
";
    $output_string .="$('#datetimepicker$n').datetimepicker({
";
    $output_string .="defaultDate:new Date()
";
    $output_string .="});
";
    $output_string .="});
";
    $output_string .="</script>
";
    $n++;
    }

echo json_encode($output_string);

?>