print php array values with jquery?

The jquery script is printng " and , why?

php script:

<?php
session_start();

include 'classes/datahandle.class.php';

$data = new Datahandle();
$query = "SELECT i.instructionValue FROM INSTRUCTION_INPUT i WHERE i.deviceId = '$_SESSION[deviceId]' AND i.instructionState = '1' ORDER BY inputPortNumber";
$inputResult = $data->selectDataQuery($query);

while ($inRow = mysql_fetch_array($inputResult)){
    $array[] = $inRow[0];
}

header("Content-type: text/plain");
echo json_encode($array);
?>

jquery script:

<script>
$(document).ready(function() {

  var refreshId = setInterval(function() {  
    $.get('response.php', function(data) {
      $.each(data, function(index, value) {
        $('#value'+index).html(value).show();
      });
    });
  }, 3000);
  $.ajaxSetup({ cache: false});
});
</script>

HTML:

<tbody><tr style="color: white; font-weight: bold;">
    </tr>
        <tr>
        <td style="text-align: center; color: white; font-weight: bold;" id="value0">[</td>
    </tr>
        <tr>
        <td style="text-align: center; color: white; font-weight: bold;" id="value1">"</td>
    </tr>
        <tr>
        <td style="text-align: center; color: white; font-weight: bold;" id="value2">1</td>
    </tr>
        <tr>
        <td style="text-align: center; color: white; font-weight: bold;" id="value3">1</td>
    </tr>
        <tr>
        <td style="text-align: center; color: white; font-weight: bold;" id="value4">"</td>
    </tr>
        <tr>
    开发者_如何学运维    <td style="text-align: center; color: white; font-weight: bold;" id="value5">,</td>
    </tr>
        <tr>
        <td style="text-align: center; color: white; font-weight: bold;" id="value6">"</td>
    </tr>
    </tbody>

You need to use $.getJSON, which parses the JSON object retrieved from the AJAX request, instead of trying to process a raw string:

$.getJSON('response.php', function(data) {

Also, as suggested by @Rocket, you should change header("Content-type: text/plain"); to header("Content-type: application/json"); in response.php.

Here is the version without parsing JSON, which reproduces your problem: http://jsfiddle.net/XQ7cX/.

Here is the version with parsing JSON, which shows correctly: http://jsfiddle.net/XQ7cX/1/