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Monday, January 19, 2015

PHP Ajax images and file upload script

PHP Ajax upload for images and files scripts

<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="jquery.form.js"></script>
<script type="text/javascript">

$(document).ready(function() {
var options = {
beforeSubmit: showRequest,
success: showResponse,
url: 'upload4jquery.php', // your upload script
dataType: 'json'
$('#Form1').submit(function() {
document.getElementById('message').innerHTML = '';
return false;

function showRequest(formData, jqForm, options) {
var fileToUploadValue = $('input[@name=fileToUpload]').fieldValue();
if (!fileToUploadValue[0]) {
document.getElementById('message').innerHTML = 'Please select a file.';
return false;

return true;

function showResponse(data, statusText) {
if (statusText == 'success') {
if (data.img != '') {
document.getElementById('result').innerHTML = '<img
src="/upload/thumb/'+data.img+'" />';
document.getElementById('message').innerHTML = data.error;
} else {
document.getElementById('message').innerHTML = data.error;
} else {
document.getElementById('message').innerHTML = 'Unknown error!';


Next create a PHP script named "upload4jquery.php" and place it in the
same directory where the other files are located. Place this code into
your PHP file:


$foto_upload = new Foto_upload;

$json['size'] = $_POST['MAX_FILE_SIZE'];
$json['img'] = '';

$foto_upload->upload_dir = $_SERVER['DOCUMENT_ROOT']."/upload/";
$foto_upload->foto_folder = $_SERVER['DOCUMENT_ROOT']."/upload/";
$foto_upload->thumb_folder = $_SERVER['DOCUMENT_ROOT']."/upload/thumb/";
$foto_upload->extensions = array(".jpg", ".gif", ".png");
$foto_upload->language = "en";
$foto_upload->x_max_size = 480;
$foto_upload->y_max_size = 360;
$foto_upload->x_max_thumb_size = 120;
$foto_upload->y_max_thumb_size = 120;

$foto_upload->the_temp_file = $_FILES['fileToUpload']['tmp_name'];
$foto_upload->the_file = $_FILES['fileToUpload']['name'];
$foto_upload->http_error = $_FILES['fileToUpload']['error'];
$foto_upload->rename_file = true;

if ($foto_upload->upload()) {
$foto_upload->process_image(false, true, true, 80);
$json['img'] = $foto_upload->file_copy;

$json['error'] = strip_tags($foto_upload->show_error_string());
echo json_encode($json);

This tutorial or guide is not about how to use the PHP upload class.
If you never used the class before, than try the example files first
and try than the Ajax upload form.
Paths and upload directories

You need to create two upload directories: One for the upload main
file and one for the thumbnails. Check/change the permission for the
directories (CHMOD the directories with 0755). If you use the same
structure as suggested in the PHP class file, there is no need to
change the includes at the top of the PHP script.

Now we need to create the form HTML and some other containers where
the response data will be placed.

<form id="Form1" name="Form1" method="post" action="">
<input type="hidden" name="MAX_FILE_SIZE" value="<?php echo
$max_size; ?>" />
Select an image from your hard disk:

<input type="file" name="fileToUpload" id="fileToUpload" size="18" />
<input type="Submit" value="Submit" id="buttonForm" />
<img id="loading" src="loading.gif" style="display:none;" />

<p id="message">

<p id="result">

The file loading.gif is the upload indicator image, pick the file I've
used on the demo page or check Google for other stylish images or use
an online image generator.

Some final note, the code works as it is. Don't change variable names
or form field attributes, if you're not sure how to change them inside
your JavaScript code.

Requote by

Hery Purnama (Freelance IT Trainer)
Jakarta, Bandung, Yogya, Bali

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