Today I am presenting the most important social networking feature called multiple ajax image upload without refreshing the page using jquery and PHP. We just modified few lines of code in jqery.form.js plugin and renamed that to jquery.wallform.js. This feature is one of the key feature in Wall Script sale, big thanks to Arun Sekar for this code trick.
Javascript Code
$("#photoimg").on('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="http://ajax.googleapis.com/
ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript" src="jquery.wallform.js"></script>
<script type="text/javascript">
$(document).ready(function()
{
$('#photoimg').on('change', function()
{
var A=$("#imageloadstatus");
var B=$("#imageloadbutton");
$("#imageform").ajaxForm({target: '#preview',
beforeSubmit:function(){
A.show();
B.hide();
},
success:function(){
A.hide();
B.show();
},
error:function(){
A.hide();
B.show();
} }).submit();
});
});
</script>Here hiding and showing #imageloadstatus and #imageloadbutton based on form upload submit status.
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
?>
<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>
</form>Sample database design for Users.
Users
Contains user details username, password and email.
CREATE TABLE `users` (
`uid` int(11) AUTO_INCREMENT PRIMARY KEY,
`username` varchar(255) UNIQUE KEY,
`password` varchar(100),
`email` varchar(255) UNIQUE KEY
)User Uploads
Contains user upload details upload_id, image_name, user_id_fk(foreign key) and timestamp etc.
CREATE TABLE `user_uploads` (
`upload_id` int(11) AUTO_INCREMENT PRIMARY KEY,
`image_name` text,
`user_id_fk` int(11),
`created` int(11)
)ajaximage.php
Contains PHP code. This script helps you to upload images into the uploads folder. Image file name renames 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))
{
//Insert upload image files names into user_uploads table
mysqli_query($db,"INSERT INTO user_uploads(image_name,user_id_fk,created) VALUES('$image_name','$session_id','$time')");
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;
}
?>
db.php
Database configuration file, modify username, password and database values.
<?php
define('DB_SERVER', 'localhost');
define('DB_USERNAME', 'username');
define('DB_PASSWORD', 'password');
define('DB_DATABASE', 'database');
$db = mysqli_connect(DB_SERVER,DB_USERNAME,DB_PASSWORD,DB_DATABASE);
?>
