在IE中显示逗号（，）的Ajax数组[关闭]

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            <div class="grid--cell mb0 mt8">Closed <span title="2013-01-07 15:32:18Z" class="relativetime">7 years ago</span>.</div>
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I do not understand as to why I have this issue arising. in Chrome and Firefox my ajax works well and there are so errors, however, when I run the Ajax request in IE the resulting output is the data but with a series of commas (,) at the top of my page.

example:

,
,
,
,
<tr> row1 </tr>
<tr> row2 </tr>
<tr> row3 </tr>
<tr> row4 </tr>

I want the output to be:

    <tr> row1 </tr>
    <tr> row2 </tr>
    <tr> row3 </tr>
    <tr> row4 </tr>

Code: index.php

function indexMostRecent(linkcode) {
            var lines = '';
                $.ajax( {
                type: 'POST',
                url:'http://site.test.co.uk/shortlinks/nextLines.php', 
                data: { 'indexLeft': 1 },
                cache: false,
            }).done( function(jsondata) {

            lines = jsondata; 

            var obj = jQuery.parseJSON( lines );

            $('#leftIndex').append( obj + '<tr id="less"><td> End </td></tr> ' );
            $('#indexLeft').remove();
        });
    };


    $('#indexLeft').click(indexMostRecent);

nextlines.php

<?php
include ('connection.php');
//these are the queries for the index page
    if(isSet($_POST['indexLeft'])){

            $mostRec = "SELECT * FROM shortlink_analytics ORDER BY hitTime DESC LIMIT 11, 999999";

            $array=array();

            $loadRec = mysql_query($mostRec);

            while($row = mysql_fetch_array($loadRec))
            {
                $array[] = '<tr><td class="overflow"><a href = "info.php?link='. $row['shortlink'] .'">hud.ac/' . $row['shortlink'] . '</a> - ' . $row['hitTime'] . '</td></tr>';
            } 

            echo json_encode($array);

        }

?>

what is causing this? How would I go about solving it? Might it have something to do with the PHP that is getting called in during the AJAX request?

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