Today I am presenting the most important feature called multiple ajax image upload without refreshing the page using jquery and PHP.

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. Uploaded images will <i>prepend</i> inside <i>#preview</i> tag.
<script type="text/javascript" src=" ajax/libs/jquery/1.8.1/jquery.min.js"></script>
<script type="text/javascript" src="jquery.wallform.js">
</script> <script type="text/javascript">
$(document).ready(function() {
    $('#photoimg').live('change', function() {
           var A=$("#imageloadstatus");
           var B=$("#imageloadbutton");
           $("#imageform").ajaxForm({target: '#preview', beforeSubmit:function()
                }, success:function(){ A.hide();; },
                   error:function(){ A.hide();; } }).submit(); }); });

Here hiding and showing #imageloadstatus and #imageloadbutton based on form upload submit status.

Contains simple PHP and HTML code. Here $session_id=1 means user id session value.

   $session_id='1'; // User login session value ?>
  <div id='preview'> </div>
 <form id="imageform" method="post" enctype="multipart/form-data" action='ajaximage.php'> Upload image:
 <div id='imageloadstatus' style='display:none'>
         <img src="loader.gif" alt="Uploading...."/></div>
<div id='imageloadbutton'> <input type="file" name="photoimg" id="photoimg" /> </div>
Sample database design for 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), )
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 $path = "uploads/"; function getExtension($str) { $i = strrpos($str,"."); if (!$i) { return ""; } $l = strlen($str) - $i; $ext = substr($str,$i+1,$l); return $ext; } $valid_formats = array("jpg", "png", "gif", "bmp","jpeg","PNG","JPG","JPEG","GIF","BMP"); if(isset($_POST) and $_SERVER['REQUEST_METHOD'] == "POST") { $name = $_FILES['photoimg']['name']; $size = $_FILES['photoimg']['size']; if(strlen($name)) { $ext = getExtension($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; } ?>
Database configuration file, just modify database credentials.
<?php $mysql_hostname = "localhost"; $mysql_user = "username"; $mysql_password = "password"; $mysql_database = "database"; $prefix = ""; $bd = mysql_connect($mysql_hostname, $mysql_user, $mysql_password) or die("Opps some thing went wrong"); mysql_select_db($mysql_database, $bd) or die("Opps some thing went wrong"); ?>