Ajax Image Upload without Refreshing Page using Jquery.

Javascript Code
$("#photoimg").live('change',function(){})- photoimg is the ID name of INPUT FILE tag and $('#imageform').ajaxForm() - imageform is the ID name of FORM. While changing INPUT it calls FORM submit without refreshing page using ajaxForm() method.
<script type="text/javascript" src="http://ajax.googleapis.com/
ajax/libs/jquery/1.5/jquery.min.js"></script>
<script type="text/javascript" src="jquery.form.js"></script>
<script type="text/javascript">
$(document).ready(function()
{
$('#photoimg').live('change', function()
{
$("#preview").html('');
$("#preview").html('<img src="loader.gif" alt="Uploading...."/>');
$("#imageform").ajaxForm(
{
target: '#preview'
}).submit();
});
});
</script>

index.php
Contains simple PHP and HTML code. Here $session_id=1 means user id session value.
<?php
include('db.php');
session_start();
$session_id='1'; // User login session value
?>

<form id="imageform" method="post" enctype="multipart/form-data" action='ajaximage.php'>
Upload image <input type="file" name="photoimg" id="photoimg" />
</form>

<div id='preview'>
</div>

Sample database design for Users.

Users
Contains user details username, password, email, profile_image and profile_image_small etc.
CREATE TABLE `users` (
`uid` int(11) AUTO_INCREMENT PRIMARY KEY,
`username` varchar(255) UNIQUE KEY,
`password` varchar(100),
`email` varchar(255) UNIQUE KEY,
`profile_image` varchar(200),
`profile_image_small` varchar(200),
)

ajaximage.php
Contains PHP code. This script helps you to upload images into uploads folder. Image file name rename into timestamp+session_id.extention
<?php
include('db.php');
session_start();
$session_id='1'; // User session id
$path = "uploads/";

$valid_formats = array("jpg", "png", "gif", "bmp","jpeg");
if(isset($_POST) and $_SERVER['REQUEST_METHOD'] == "POST")
{
$name = $_FILES['photoimg']['name'];
$size = $_FILES['photoimg']['size'];
if(strlen($name))
{
list($txt, $ext) = explode(".", $name);
if(in_array($ext,$valid_formats))
{
if($size<(1024*1024)) // Image size max 1 MB
{
$actual_image_name = time().$session_id.".".$ext;
$tmp = $_FILES['photoimg']['tmp_name'];
if(move_uploaded_file($tmp, $path.$actual_image_name))
{
mysql_query("UPDATE users SET profile_image='$actual_image_name' WHERE uid='$session_id'");
echo "<img src='uploads/".$actual_image_name."' class='preview'>";
}
else
echo "failed";
}
else
echo "Image file size max 1 MB";
}
else
echo "Invalid file format..";
}
else
echo "Please select image..!";
exit;
}
?>

Tags : Jquery, Php, Mysql, Html, Image Upload, Ajax