How can I create the callback in ajax form? - javascript

How can I create the callback after a file is upload on the server?
I want to upload a file on a server after a JS function call.
I want to call the function addDownload and after this function is complete, then call the next javascript function. How can I do this?
I have a following source code:
HTML:
<form id="imageform" method="post" enctype="multipart/form-data" action="actions/downloadsadd.php">
<strong>File: </strong><input name="photoimg" id="photoimg" style="width: 100px;" type="file" />
Select Image: <br />
<div id="divPreview"></div>
</form>
Javascript:
addDownload: function ()
{
$("#divPreview").html('');
$("#divPreview").html('<img src="Images/loader.gif" alt="Uploading...."/>');
$("#imageform").ajaxForm(
{
target: '#divPreview'
}).submit();
},
PHP - downloads.php:
public function addDownloads() {
$db = new DB();
$db->connect();
$path = "../../images/upload/files/";
$valid_formats = array("php", "phtml", "php3", "php4", "js", "shtml", "pl", "py", "html", "exe", "bat", "htm", "sql");
if (isset($_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() . "." . $ext;
$tmp = $_FILES['photoimg']['tmp_name'];
if (move_uploaded_file($tmp, $path . $actual_image_name)) {
$arr = array(
'file' => $actual_image_name
);
dibi::query('INSERT INTO [downloads]', $arr);
echo "FILE:" .$actual_image_name;
}
else
echo "Failed upload!";
}
else
echo "Image file size max 1 MB";
}
else
echo "Invalid file format..";
}
else
echo "Please select image..!";
}
}

Just guessing, but your code seems use the jQuery form plugin:
$("#imageform").ajaxForm(...);
The plugin allows you to add a callback function using the success option. This function will be invoked when the AJAX request (i.e. all the code in the PHP file you're calling) has finished successfully.
$("#imageform").ajaxForm({
target: '#divPreview',
data: {
var1: $("#inputText").val() //assuming #inputText is a text field
},
success: function() {
alert("Callback!");
}
}).submit();
See the documentation for further reference.

I did like this to upload avatar.
<script type="text/javascript">
$('input[id=lefile]').change(function() {
$('#photoCover').val($(this).val());
});
function doUpload(){
//Use FormData to get files in form.
var formData = new FormData($("#myform")[0]);
$.ajax({
url: $('#myform').attr('action'),
type: 'POST',
data: formData,
async: false,
cache: false,
contentType: false,
processData: false,
success: function (returndata) {
alert(returndata);
},
error: function (returndata) {
alert(returndata);
}
});
}
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="avatar-content">
<form id="myform" action="http://www.example.com/editor/" method=post enctype=multipart/form-data>
<input id="lefile" type="file" name="file" style="display:none">
<div class="input-append">
<input id="photoCover" type="text" class="form-control" style="height:34px; width: 54%; display: inline-block;" onclick="$('input[id=lefile]').click();">
<div class="btn btn-primary btn-file" onclick="doUpload()">
<i class="fa fa-upload"></i> Upload
</div>
</div>
</form>
</div>

Related

CodeIgniter file upload error “You did not select a file to upload” using Ajax

I've seen and tried a few answers that are similar to this question, but it still displays the same error.
The console is also giving the error: Uncaught TypeError: Cannot read property 'length' of undefined at Function.each (jquery-1.10.2.js:631)
My view:
<form action="https://dev.vmc.w3.uvm.edu/xana/sensors/deployments" class="basicForm aboutForm form-horizontal" id="deploymentForm" enctype="multipart/form-data" method="post" accept-charset="utf-8">
<div class="form-group">
<label for="fldFileName" class="col-sm-4 control-label">Image</label>
<div class="col-sm-8">
<input type="file" name="fldFileName" value="" class="form-control" id="fldFileName" />
</div>
</div>
<button type="button" class="btn btn-primary" id="newSensorSubmit">Save</button>
</form>
javascript to submit form:
$(document).on("click", "#newSensorSubmit", function(event){
var posturl="<?php echo site_url("sensors/add_deployment");?>";
var formData = new FormData();
var fldFileName = $('#fldFileName').val();
formData.append('fldFileName', fldFileName);
jQuery.ajax({
url: posturl,
data: formData,
cache: false,
mimeType: "multipart/form-data",
dataType: 'json',
contentType: false,
processData: false,
type: 'POST',
success: function(data){
if(data.status === 'success') {
//handle success
}
else {
//handle fail
}
},
error: (error) => {
$('#articleErrorText').html(JSON.stringify(error));
}
});
});
controller:
public function add_deployment(){
$this->load->helper(array('form', 'url'));
$this->load->library('upload');
$config = array(
'upload_path' => site_url("attachments/project/999/metstations"),
'allowed_types' => "gif|jpg|png|jpeg",
'overwrite' => TRUE,
'max_size' => "16000000"
);
$this->load->library('upload', $config);
if($this->upload->do_upload('fldFileName'))
{
$data['image_metadata'] = array('image_metadata' => $this->upload->data());
}
else
{
$error = $this->upload->display_errors();
$data['errors']='<p class="error-message">'.$error.'</p>';
$data['status']='failure';
}
}
Try This.
To get all your form inputs, including the type="file" you need to use FormData object.
To append param just use append() method:
formData.append("param", "value");
And in the php-side I catch it:
echo $file_name = ($_FILES['file']['name']);
View Code:-
<body>
<p id="msg"></p>
<input type="file" id="file" name="file" />
<button id="upload">Upload</button>
</body>
jQuery / Ajax Code:-
<script type="text/javascript" src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
<script type="text/javascript">
$(document).ready(function(e){
$('#upload').on('click', function () {
var file_data = $('#file').prop('files')[0];
var form_data = new FormData();
form_data.append('file', file_data);
$.ajax({
url: 'ControllerName/upload_file', // point to server-side controller method
dataType: 'text', // what to expect back from the server
cache: false,
contentType: false,
processData: false,
data: form_data,
type: 'post',
success: function (response) {
$('#msg').html(response); // display success response from the server
},
error: function (response) {
$('#msg').html(response); // display error response from the server
}
});
});
});
</script>
Controller Code:-
class ControllerName extends CI_Controller {
function __construct() {
parent::__construct();
}
function upload_file() {
//upload file
$config['upload_path'] = 'uploads/';
$config['allowed_types'] = '*';
$config['max_filename'] = '255';
$config['encrypt_name'] = TRUE; // remove it for actual file name.
$config['max_size'] = '1024'; //1 MB
if (isset($_FILES['file']['name'])) {
if (0 < $_FILES['file']['error']) {
echo 'Error during file upload' . $_FILES['file']['error'];
} else {
if (file_exists('uploads/' . $_FILES['file']['name'])) {
echo 'File already exists : uploads/' . $_FILES['file']['name'];
} else {
$this->load->library('upload', $config);
if (!$this->upload->do_upload('file')) {
echo $this->upload->display_errors();
} else {
echo 'File successfully uploaded : uploads/' . $_FILES['file']['name'];
}
}
}
} else {
echo 'Please choose a file';
}
}
}
Note:- For more reference regarding this check this
https://developer.mozilla.org/en-US/docs/Web/API/FormData/append

jQuery File Upload and put Filename in Database

I have this AJAX message form:
HTML:
<form class="" id="message-form" action="message-send.php" method="POST">
<div class="form-group">
<textarea name="message" id="message-field" rows="3" class="form-control message-field"></textarea>
</div>
<div class="form-group">
<input type="file" id="file" name="file">
</div>
<div class="form-group text-right">
<input type="submit" id="submit" class="btn btn-success btn-sm msg-send" value="Envoyer" disabled>
</div>
</form>
JavaScript:
var message_form = $('#message-form');
message_form.submit(function (e) {
e.preventDefault();
$('#submit').attr('disabled', true).val('Sending...');
$.ajax({
type: message_form.attr('method'),
url: message_form.attr('action'),
data: message_form.serialize(),
success: function (data) {
console.log('Submission was successful.');
console.log(data);
$('#message-field').val('');
$('#submit').val('Send');
},
error: function (data) {
console.log('An error occurred.');
console.log(data);
},
});
});
PHP:
require 'config.php';
$message = $_POST['message'];
$query = 'INSERT INTO messages (time, from, to, message, file) VALUES (?, ?, ?, ?, ?)';
if (!($stmt = $mysqli->prepare($query))) {
echo $mysqli->error;
}
$stmt->bind_param('iiiss', $time, $from, $to, $message, $file);
$stmt->execute();
$stmt->close();
$mysqli->close();
Now what I need:
Upload the file using AJAX
Store the file as is to "/uploads/" with the same name
Put the filename in the db with the message
NB: The form already works well (The code presented is just a minimal version) I just need the handling of the file.
You have not included mimetypes in your ajax request.
mimeTypes: "multipart/form-data" add this inside ajax
try sending input values with formdata
var message_form = $('#message-form');
message_form.submit(function (e) {
e.preventDefault();
$('#submit').attr('disabled', true).val('Sending...');
var message_form = $('#message-form');
var file = $('#file');
var formdata = new FormData();
formdata.append('file', file.files[0]);
formdata.append('message', $('#message-field').val());
$.ajax({
type: message_form.attr('method'),
url: message_form.attr('action'),
mimeTypes: "multipart/form-data,
data: formdata,
async: true,
contentType: false,
processData: false,
beforeSend: function(){
},
success: function (data) {
console.log('Submission was successful.');
console.log(data);
$('#message-field').val('');
$('#submit').val('Send');
},
error: function (data) {
console.log('An error occurred.');
console.log(data);
},
});
}

getting the value of a array from controller to view with ajax in codeigniter

I am creating a status update system where i need to upload a image as well as show it when it uploads all using ajax but when i send the image it goes to the database but i cannot access the image in the ajax return
here is the code
<div class="tab-pane fade" id="tabs-2">
<?php echo form_open_multipart('',["id"=>"formupload","name"=>"formupload"]); ?>
<p class="formUnit"> <i class="active_pic"></i>
<input type="hidden" name="id" value="<?php echo $id; ?>">
<button class="uibutton" type="button" id="upload_pic" style="width: 230px; height: 150px;">Upload Picture</button><span id="status"></span>
<?php echo form_upload(["name"=>"imagefile","id"=>"upload_pic" ]); ?>
<ol class="controls clearfix">
<?php echo form_submit(['name'=>'submit','value'=>'Submit',"class"=>"btn btn-primary"]); ?>
</ol>
</p>
<p id="files"></p>
<?php echo form_close(); ?>
</div>
now ajax
jQuery('#formupload').submit(function(e){
e.preventDefault();
var formData = new FormData(this);
var url= '<?php echo base_url("user/postData_image"); ?>';
formData.value
jQuery.ajax({
type: "POST",
url:url,
data: formData,
cache: false,
contentType: false,
processData: false,
success: function(data)
{
console.log(data);
$('#output_post').attr('src',data);
},
error: function(data){
//error function
}
});
});
now controller
public function postData_image()
{
$config = [
'upload_path' => './uploads/',
'allowed_types' => 'jpg|gif|png|jpeg',
'max_size' => 10000000000000,
'max_width' => 1024000000,
'max_height' => 7680000000,
];
$this->load->library('upload', $config);
$this->upload->initialize($config);
$imagefile="imagefile";
if(!$this->upload->do_upload($imagefile))
{
$upload_error = $this->upload->display_errors();
$this->load->view('dashboard/profile',compact('upload_error'));
}
else
{
$post = $this->input->post();
//print_r($post);
unset($post['submit']);
$upload_data = $this->upload->data();
$file_name=$_FILES['imagefile'];
$this->load->model('Pmodel');
$post_data=$this->Pmodel->post_data_image($post,$file_name);
$post['data']=$post_data;
echo $image_path= base_url("uploads/".$upload_data['raw_name'].$upload_data['file_ext']);
return $post;
}
}
model
public function post_data_image($arr,$arra)
{
$id=$arr['id'];
$image=$arra['name'];
$data=array('image'=>$image);
$query=$this->db->insert('post_status',['user_id'=>$id,'image'=>$image]);
return $query;
}
but how to return the value that is generated after insert in the database using ajax
You want to output your post as json so jquery can interpret it.
echo json_encode($post);
To your ajax function add:
dataType: 'json'
And then data will be an array you can use.
Thanx to #Callombert i got the answer for what i was looking i wanted to return the value and 'echo json_encode('$image_path) or $post would return the value in the json form thus you cacn access it in your view
for someone else looking for an answer just add echo json_encode($image_path);
To your ajax function add:
dataType: 'json'
this would get you working.

Upload File Using Ajax in Codeigniter

I am trying to upload a file with some other data. The thing is I'm getting the error that You did not select a file to upload. I can't understand what is it that I'm doing wrong. I would be really glad if anybody can point out what is it that I am doing wrong. Thanks
html file
<div class="modal-body">
<form id="add_message" enctype="multipart/form-data" method="post" action="<?php echo base_url() ?>apps/messages/composeMessage">
<div class="form-group">
<select id="messageTo" class="form-control" data-plugin="select2" multiple="multiple" data-placeholder="To:" name="messageTo">
</select>
</div>
<div class="form-group">
<input class="form-control" placeholder="Subject" id="messageSubject" name="messageSubject"></input>
</div>
<div class="form-group">
<textarea data-provide="markdown" data-iconlibrary="fa" rows="10" id="messageBody" name="messageBody"></textarea>
</div>
<input type="hidden" name="fname" value="" id="formName" ></input>
<div class="left">
<!-- <span class="btn green fileinput-button"> -->
<input id="message_attachement" type="file" name="file_attac" size="20" >
<!-- </span> -->
</div>
<!-- <button class="btn btn-primary" type="submit" value="submit">Send</button> -->
</form>
</div>
<div class="modal-footer text-left">
<button class="btn btn-primary" data-dismiss="modal" id="addformButton">Send</button>
<button class="btn btn-primary" data-dismiss="modal" id="saveformButton">Save</button>
<a class="btn btn-sm btn-white btn-pure" data-dismiss="modal" href="javascript:void(0)">Cancel</a>
</div>
JS
$("#addformButton").on('click' , function(){
debugger;
$.ajax({
type: "POST",
url: base_url + "apps/messages/composeMessage",
async: false,
mimeType: "multipart/form-data",
dataType:JSON,
data:{
'reciever': $('#messageTo').val() ,
'subject': $('#messageSubject').val(),
'text': $('#messageBody').val(),
'type': 'active',
'msgId': $('#formName').val(),
'attachment' : $('#message_attachement').val()
},
success: function(response){
},
error: function(response){
}
});
});
Controller
$this->load->helper('file_upload');
$filename = $this->input->post('attachment');
$path = 'uploads/attachments/';
$allowed_types = 'erb|php|txt';
$redirect = '';
// error_log("outside");
if (!empty($this->input->post('attachment'))) {
// error_log("inside");
// error_log ("Parameters: " . $path." Types: ". $allowed_types." name: ". $filename." redirect: ". $redirect);
$parameters['profile_pic'] = file_upload($path, $allowed_types, $filename, $redirect);
// error_log("The path is ");
// error_log($parameters['profile_pic']);
if ($this->session->set_userdata("img_errors")) {
// error_log("error");
return false;
}
}
File Upload function
function file_upload($upload_path , $allowed_types , $filename , $redirect)
{
$ci = & get_instance();
$config['upload_path'] = $upload_path;
$config['allowed_types'] = $allowed_types;
// $config['max_size'] = 1024;//1mb
// $config['max_width'] = 1024;
// $config['max_height'] = 1024;
$ci->load->library('upload', $config);
$data = NULL;
if (!$ci->upload->do_upload($filename)) {
error_log("within the file");
// $error = array('error' => $ci->upload->display_errors());
error_log($ci->upload->display_errors());
$ci->session->set_userdata('img_errors', $ci->upload->display_errors());
//error_log(print_r($ci->upload->display_errors(),true));
// redirect(base_url() . $redirect);
} else {
error_log("uploading");
$data = array('upload_data' => $ci->upload->data());
// do_resize($config['upload_path'] , $data['upload_data']['file_name']);
}
return $config['upload_path'] . $data['upload_data']['file_name'];
}
This is the working code I used in my most recent project, the code is self explanatory however feel free to ask any question.
HTML:
<form action="http://localhost/index.php/upload_file" method="post" style="display:none;" id="file_upload_form" enctype="multipart/form-data">
<input type="file" id="dialog_triggerer" name="uploaded_file">
</form>
<button class="btn btn-default btn-fab-sm" id="file_attach">
<span class="mdi-file-attachment"></span>
</button>
JS:
trigger this code on some action:
var form = $('form')[0]; // standard javascript object here
var formData = new FormData(form);
if($("#dialog_triggerer").val()!=""){
$.ajax( {
url: FRONTEND_URL + '/upload_file',
type: 'POST',
data: formData,
processData: false,
contentType: false,
async: false
} ).done(function(data){
file_data = JSON.parse(data);
new_post.file_data = file_data;
});
}
upload_file ctrl:
<?php
class Upload_file extends CI_Controller{
public function __construct(){
parent::__construct();
}
public function index(){
$valid_file=true;
$message;
//if they DID upload a file...
if($_FILES['uploaded_file']['name'])
{
//if no errors...
if(!$_FILES['uploaded_file']['error'])
{
//now is the time to modify the future file name and validate the file
$new_file_name = strtolower($_FILES['uploaded_file']['name']); //rename file
if($_FILES['uploaded_file']['size'] > (20024000)) //can't be larger than 20 MB
{
$valid_file = false;
$message = 'Oops! Your file\'s size is to large.';
}
//if the file has passed the test
if($valid_file)
{
$file_path = 'themes/uploads/'.$new_file_name;
move_uploaded_file($_FILES['uploaded_file']['tmp_name'], FCPATH . $file_path);
$message = 'Congratulations! Your file was accepted.';
}
}
//if there is an error...
else
{
//set that to be the returned message
$message = 'Ooops! Your upload triggered the following error: '.$_FILES['uploaded_file']['error'];
}
}
$save_path = base_url().$file_path;
$name = $_FILES['uploaded_file']['name'];
$size = $_FILES['uploaded_file']['size'];
$type = $_FILES['uploaded_file']['type'];
$data = array(
"message" => $message,
"save" => $save_path,
"name" => $name,
"size" => $size,
"type" => $type
);
$this->load->view('upload_file/upload_file.php', $data);
}
}
upload_file.php view:
<?php
$res = array(
"msg" => $message,
"path" => $save,
"name" => $name,
"size" => $size,
"type" => $type
);
echo json_encode($res);
?>
Just found out I had not posted the solution that helped me for this problem. Here's what I did
The real problem was with sending the file to the server. I just needed to set the cache, processData and contentType to false and that worked for me.
and one more thing I needed to send data to the server using form data.
I have posted the relevant code that helped me sending data to the server. Hope it helps
var form = $('#add_message')[0]; // standard javascript object here
var formData = new FormData( $('#add_message')[0]);
$.ajax({
type: "POST",
url: base_url + "apps/messages/composeMessage",
cache: false,
contentType: false,
processData: false,
data: formData,
success: function(response){
// some action on success
},
error: function(response){
// some action on error
}
});

uploading image in a form using codeigniter/ajax

what should I do if i can't upload an image in a form it successfully created but the file is shows 0 not the upload file. please help me thanks in advance!
script in view where I can update and add a single form with upload
<script type="text/javascript">
var save_method; //for save method string
var table;
$(document).ready(function() {
table = $('#dataTable2').DataTable({
"processing": true, //Feature control the processing indicator.
"serverSide": true, //Feature control DataTables' server-side processing mode.
// Load data for the table's content from an Ajax source
"ajax": {
"url": "<?php echo site_url('about/ajax_list')?>",
"type": "POST"
},
//Set column definition initialisation properties.
"columnDefs": [
{
"targets": [ -1 ], //last column
"orderable": false, //set not orderable
},
],
});
});
function add_person()
{
save_method = 'add';
$('#form')[0].reset(); // reset form on modals
$('#myModal').modal('show'); // show bootstrap modal
$('.modal-title').text('Add About US'); // Set Title to Bootstrap modal title
}
function edit_person(about_id)
{
save_method = 'update';
$('#form')[0].reset(); // reset form on modals
//Ajax Load data from ajax
$.ajax({
url : "<?php echo site_url('about/ajax_edit/')?>/" + about_id,
type: "GET",
dataType: "JSON",
success: function(data)
{
$('[name="about_id"]').val(data.about_id);
$('[name="about_details"]').val(data.about_details);
$('[name="images"]').val(data.image);
$('#myModal').modal('show'); // show bootstrap modal when complete loaded
$('.modal-title').text('Edit Person'); // Set title to Bootstrap modal title
},
error: function (jqXHR, textStatus, errorThrown)
{
alert('Error get data from ajax');
}
});
}
function reload_table()
{
table.ajax.reload(null,false); //reload datatable ajax
}
function save()
{
var url;
if(save_method == 'add')
{
url = "<?php echo site_url('about/ajax_add')?>";
}
else
{
url = "<?php echo site_url('about/ajax_update')?>";
}
// ajax adding data to database
$.ajax({
url : url,
type: "POST",
data: $('#form').serialize(),
dataType: "JSON",
success: function(data)
{
//if success close modal and reload ajax table
$('#myModal').modal('hide');
reload_table();
if (empty($_FILES['image'])) {
return FALSE;
}
},
error: function (jqXHR, textStatus, errorThrown)
{
alert('Error adding / update data');
}
});
}
function delete_person(about_id)
{
if(confirm('Are you sure delete this data?'))
{
// ajax delete data to database
$.ajax({
url : "<?php echo site_url('about/ajax_delete')?>/"+about_id,
type: "POST",
dataType: "JSON",
success: function(data)
{
//if success reload ajax table
$('#myModal').modal('hide');
reload_table();
},
error: function (jqXHR, textStatus, errorThrown)
{
alert('Error adding / update data');
}
});
}
}
This is my form
<div class="modal-body form">
<form action="#" id="form">
<input type="hidden" value="" name="about_id"/>
<!-- <div class="form-group has-feedback ">
<label>Date</label>
<input type="date" id="date" class="form-control" input-sm placeholder="Date"/>
</div>-->
<div class="form-group has-feedback">
<label>About Details</label>
<input type="text" id="title" name="about_details" class="form-control" input-sm placeholder="About Details"/>
</div>
<!-- Description -->
<div class="form-group has-feedback">
<label>Image</label>
<?php $attrib = array('type'=>'text','name'=>'image','class'=>'form-control','id'=>'file'); ?>
<?php echo form_upload( $attrib,set_value('image')); ?>
</form>
<div class="modal-footer">
<button type="button" class="btn btn-default pull-left" data-dismiss="modal">Close</button>
<button type="button" id="btnSave" class="btn btn-success" aria-hidden="true" onclick="save()">Save</button>
my controller for add and update
public function ajax_add()
{
$data = array(
'about_details' => $this->input->post('about_details'),
'image' => $this->upload->do_upload('image'),
);
$insert = $this->person->save($data);
echo json_encode(array("status" => TRUE));
}
public function ajax_update()
{
$data = array(
'about_details' => $this->input->post('about_details'),
'image' => $this->upload->do_upload('image'),
);
$this->person->update(array('about_id' => $this->input->post('about_id')), $data);
echo json_encode(array("status" => TRUE));
}
What I have found out on uploading through ajax in CodeIgniter is that when we submit the form the images doesn't get uploaded. Because of this I used an extra js file "jquery.form.min.js" and the ajax upload went well. To implement it the script would look like:
$('#uploadimg').ajaxForm({
//uploadimg is my form id
dataType: 'json',
success: processJson
});
function processJson(data) {
if(data.msg=="success"){
alert('Upload is successful.');
}
else{
alert('Upload couldn't be completed.');
}
}
The form would be
<form action="<?=base_url();?>controller/uploadImage/" method="post" enctype="multipart/form-data" id="uploadimg">
On submition this will call the uploadImg function in the controller and here saving the image and insertion in the database is done.
public function uploadImage(){
//$id = $this->session->userdata('uid');
$config[ 'upload_path' ] = UPLOAD_DIR.'/newsletter/0';
$config[ 'allowed_types' ] = 'gif|jpg|png';
$config[ 'max_size' ] = '1500';
$config[ 'max_width' ] = '1000';
$config[ 'max_height' ] = '1500';
$image_name = "files";
$this->load->library( 'upload', $config );
if ( $this->upload->do_upload( $image_name ) ) {
$upload_data = $this->upload->data();
if(!empty($upload_data)){
$arg = array(
'name' => $upload_data[ 'file_name' ]
);
$this->modelName->insert($arg );
$data['msg']="success";
}
else{
$data['errmsg']="Couldnot upload the file!";
}
}
else{
$data['errmsg'] =$this->upload->display_errors();
}
echo json_encode($data);
}
Now this will trigger the processJson function in the script. And the upload shows the result.
You can find the javascript file on jquery.form.js.
I hope it works out for you.

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