I want to populate the array values into database in PHP.

<?php

include_once("config.php");

$videoDetailsData = json_decode($_POST['videoDetailsData']);


foreach($videoDetailsData as $videoDetails)
{
$thumbnailImage = mysql_real_escape_string($videoDetails.thumbnailImage);
$title = mysql_real_escape_string($videoDetails.title);
$category = mysql_real_escape_string($videoDetails.category);
$description = mysql_real_escape_string($videoDetails.description);
$videoLink = mysql_real_escape_string($videoDetails.videoLink);

$result = mysql_query("INSERT into videoDetails(thumbnailImage,title,category,description,videoLink)                values('$thumbnailImage','$title','$category','$description','$videoLink')");
}

if($result)
{
echo "success";
}
mysql_close();
?>

<script>

jQuery(document).ready(function()
{

    jQuery('#submit').click(function()
    {
        var videoDetails =[];
        jQuery('.mycheckbox').each(function()
        {
            if (this.checked == true)
                        {
                var obj = {};

                obj.thumbnailImage =jQuery (this).parent(). find('table').find ('tbody').find('tr').find('td:first').find('img').prop("src");
                obj.title=jQuery(this).parent() .find('table').find('tbody').find('tr') .find('td:nth(1)').find('p:nth(0)').html();
                obj.category=jQuery(this).parent().find('table') .find('tbody').find ('tr').find('td:nth(1)').find('p:nth(1)').html();
                obj.description=jQuery(this). parent().find('table'). find('tbody'). find('tr').find('td:nth(1)').find('p:nth(2)').html();
                obj.videoLink=jQuery(this).parent(). find('table').find('tbody').find ('tr').find('td:nth(1)').find('p:nth(3)').find('a').prop("href");

                videoDetails.push(obj);

                    //alert(videoDetails);
            }
        });
//var jsonString = {array: videoDetails}JSON.stringify(videoDetails);
var jsonString = JSON.stringify(videoDetails);
//alert(jsonString);
        jQuery.ajax(
                {
                type: 'POST',
                url: 'result.php',
                data: JSON.stringify({ 'videoDetailsData': jsonString }),
                success: function(data)
                {
                    if(data=="success")
                    {
                    alert("Data stored successfully");
                    }
                },
                error: function(xhr, textStatus, errorThrown)
                {
                    alert('An error occurred! ' + ( errorThrown ? errorThrown :xhr.status));
                }
                });
//jQuery.post('result.php',{data:jsonString},function(data){alert(data);}{'videoDetailsData': jsonString});

    });

});
</script>

<div id="outputDiv"></div>
<form id="testform" method="POST" action="">
<div>
	<select id="parentCategory" value="parentCategory" name="category">
		<option selected="selected" name="category" value="selected">--Select category--</option>
	</select>
</div>

<div>
	<select id="subCategory" name="subCategory">
		<option selected="selected" name="subCategory" value="selected">--Select subCategory--</option>
	</select><br><br><br>

<div id="results">
</div>
<input type="button" id="submit" value="save"/>
</br></br></br></div>
</form>
</body>
</html>