This is another files and images upload tutorial using jQuery. I am using Blueimp jQuery Plugin to upload files into server folder using JavaScript and PHP. PHP for server side programming to upload files and images on server.

Blue-imp File Upload widget has many features like multiple file selection, drag&drop support, progress bar, validation and preview images, audio and video for jQuery. It also supports cross-domain, chunked and resumable file uploads. You can integrate with any server-side platform (Google App Engine, PHP, Python, Ruby on Rails, Java, etc.) that supports standard HTML form file uploads.

jQuery File Upload application file structure as below,

index.html : This file will have HTML code to display add file and list-down all uploaded files.
common.js : This file will contain all jquery code to upload files and images.
server/index.php : This file will create the main php handler class object.
server/UploadHandler.php : This file will have all handler methods to upload and save into a folder.
server/files : This folder will contain the uploaded image and thumbnail of file/image.

Also Checkout other useful jQuery tutorials,

How to upload Files and Images using jQuery Widget

We need to download libs from Github Repo and included as a local repository, You can also use CDN path for blueimp file upload libs. I am using CDN path into head section of index.html file.

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
  <!-- The jQuery UI widget factory, can be omitted if jQuery UI is already included -->
  <script src="https://cdnjs.cloudflare.com/ajax/libs/blueimp-file-upload/9.19.2/js/vendor/jquery.ui.widget.js"></script>
  <!-- The Templates plugin is included to render the upload/download listings -->
<script src="//blueimp.github.io/JavaScript-Templates/js/tmpl.min.js"></script>
<!-- Bootstrap JS is not required, but included for the responsive demo navigation -->
<script src="//netdna.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>

	<!-- The Load Image plugin is included for the preview images and image resizing functionality -->
	<script src="//blueimp.github.io/JavaScript-Load-Image/js/load-image.all.min.js"></script>
	<!-- The Canvas to Blob plugin is included for image resizing functionality -->
	<script src="//blueimp.github.io/JavaScript-Canvas-to-Blob/js/canvas-to-blob.min.js"></script>
	<!-- Bootstrap JS is not required, but included for the responsive demo navigation -->
	<script src="//netdna.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
	<!-- The Iframe Transport is required for browsers without support for XHR file uploads -->
	<script src="https://cdnjs.cloudflare.com/ajax/libs/blueimp-file-upload/9.19.2/js/jquery.iframe-transport.min.js"></script>
	<!-- The basic File Upload plugin -->
	<script src="https://cdnjs.cloudflare.com/ajax/libs/blueimp-file-upload/9.19.2/js/jquery.fileupload.min.js"></script>
	<!-- The File Upload processing plugin -->
	<script src="https://cdnjs.cloudflare.com/ajax/libs/blueimp-file-upload/9.19.2/js/jquery.fileupload-process.min.js"></script>
	<!-- The File Upload image preview & resize plugin -->
	<script src="https://cdnjs.cloudflare.com/ajax/libs/blueimp-file-upload/9.19.2/js/jquery.fileupload-image.min.js"></script>
	<!-- The File Upload validation plugin -->
	<script src="https://cdnjs.cloudflare.com/ajax/libs/blueimp-file-upload/9.19.2/js/jquery.fileupload-validate.min.js"></script>
	<!-- The File Upload user interface plugin -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/blueimp-file-upload/9.19.2/js/jquery.fileupload-ui.min.js"></script>

  <script src="common.js"></script>

I have only used bootstrap and jQuery libs as a dependency file for blueimp upload plugin. We have created separate common.js file for JavaScript code of file upload.

We will create a widget button to add files, start upload, cancel upload and delete upload. We need to add the below code into index.html file.

<form id="fileupload" action="//demo-test/" enctype="multipart/form-data" method="POST">
   <!-- Redirect browsers with JavaScript disabled to the origin page -->
   <noscript><input type="hidden" name="redirect" value="//demo-test/"></noscript>
   <!-- The fileupload-buttonbar contains buttons to add/delete files and start/cancel the upload -->
   <div class="well row fileupload-buttonbar">
      <div class="col-lg-7">
         <!-- The fileinput-button span is used to style the file input field as button --> <span class="btn btn-success fileinput-button"> <i class="glyphicon glyphicon-plus"></i> Add files... <input multiple="multiple" name="files[]" type="file"> </span> <button class="btn btn-primary start" type="submit"> <i class="glyphicon glyphicon-upload"></i> Start upload </button> <button class="btn btn-warning cancel" type="reset"> <i class="glyphicon glyphicon-ban-circle"></i> Cancel upload </button> <button class="btn btn-danger delete" type="button"> <i class="glyphicon glyphicon-trash"></i> Delete </button> <input class="toggle" type="checkbox"> <!-- The global file processing state -->
      </div>
      <!-- The global progress state -->
      <div class="col-lg-5 fileupload-progress fade">
         <!-- The global progress bar -->
         <div class="progress progress-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100">
            <div class="progress-bar progress-bar-success" style="width: 0%;"> </div>
         </div>
         <!-- The extended global progress state -->
         <div class="progress-extended"> </div>
      </div>
   </div>
</form>

We will add the bootstrap table to list down all uploaded and added(pending to upload) upload files.

We have jquery template libs to create upload/uploaded template using jQuery and HTML, We will add below code into bottom of index.html file.

<script id="template-upload" type="text/x-tmpl">
{% for (var i=0, file; file=o.files[i]; i++) { %}
    <tr class="template-upload fade">
        <td>
            <span class="preview"></span>
        </td>
        <td>
            <p class="name">{%=file.name%}</p>
            <strong class="error text-danger"></strong>
        </td>
        <td>
            <p class="size">Processing...</p>
            <div class="progress progress-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"><div class="progress-bar progress-bar-success" style="width:0%;"></div></div>
        </td>
        <td>
            {% if (!i && !o.options.autoUpload) { %}
                <button class="btn btn-primary start" disabled>
                    <i class="glyphicon glyphicon-upload"></i>
                    <span>Start</span>
                </button>
            {% } %}
            {% if (!i) { %}
                <button class="btn btn-warning cancel">
                    <i class="glyphicon glyphicon-ban-circle"></i>
                    <span>Cancel</span>
                </button>
            {% } %}
        </td>
    </tr>
{% } %}
</script>
<!-- The template to display files available for download -->
<script id="template-download" type="text/x-tmpl">
{% for (var i=0, file; file=o.files[i]; i++) { %}
    <tr class="template-download fade">
        <td>
            <span class="preview">
                {% if (file.thumbnailUrl) { %}
                    <a href="{%=file.url%}" title="{%=file.name%}" download="{%=file.name%}" data-gallery><img src="{%=file.thumbnailUrl%}"></a>
                {% } %}
            </span>
        </td>
        <td>
            <p class="name">
                {% if (file.url) { %}
                    <a href="{%=file.url%}" title="{%=file.name%}" download="{%=file.name%}" {%=file.thumbnailUrl?'data-gallery':''%}>{%=file.name%}</a>
                {% } else { %}
                    <span>{%=file.name%}</span>
                {% } %}
            </p>
            {% if (file.error) { %}
                <div><span class="label label-danger">Error</span> {%=file.error%}</div>
            {% } %}
        </td>
        <td>
            <span class="size">{%=o.formatFileSize(file.size)%}</span>
        </td>
        <td>
            {% if (file.deleteUrl) { %}
                <button class="btn btn-danger delete" data-type="{%=file.deleteType%}" data-url="{%=file.deleteUrl%}"{% if (file.deleteWithCredentials) { %} data-xhr-fields='{"withCredentials":true}'{% } %}>
                    <i class="glyphicon glyphicon-trash"></i>
                    <span>Delete</span>
                </button>
                <input type="checkbox" name="delete" value="1" class="toggle">
            {% } else { %}
                <button class="btn btn-warning cancel">
                    <i class="glyphicon glyphicon-ban-circle"></i>
                    <span>Cancel</span>
                </button>
            {% } %}
        </td>
    </tr>
{% } %}
</script>

We will add jQuery code int common.js file to upload and send ajax request to php server.

$(function () {
    'use strict';

    // Initialize the jQuery File Upload widget:
    $('#fileupload').fileupload({
        // Uncomment the following to send cross-domain cookies:
        //xhrFields: {withCredentials: true},
        url: 'server/'
        //console.log('ggggg')
    });

    // Enable iframe cross-domain access via redirect option:
    $('#fileupload').fileupload(
        'option',
        'redirect',
        window.location.href.replace(
            /\/[^\/]*$/,
            '/cors/result.html?%s'
        )
    );
    
    if (window.location.hostname === 'demo-test') {
        $('#fileupload').fileupload('option', {
            url: '//demo-test/server/',
            // Enable image resizing, except for Android and Opera,
            // which actually support image resizing, but fail to
            // send Blob objects via XHR requests:
            disableImageResize: /Android(?!.*Chrome)|Opera/
                .test(window.navigator.userAgent),
            //maxFileSize: 999000,
            acceptFileTypes: /(\.|\/)(gif|jpe?g|png)$/i
        });
        // Upload server status check for browsers with CORS support:
        if ($.support.cors) {
            console.log(window.location.hostname);
            $.ajax({
                url: '//demo-test/',
                type: 'HEAD'
            }).fail(function () {
                $('
<div class="alert alert-danger">')
                    .text('Upload server currently unavailable - ' +
                            new Date())
                    .appendTo('#fileupload');
            });
        }
    } else {
        // Load existing files:
        console.log(window.location.hostname);
        $('#fileupload').addClass('fileupload-processing');
        $.ajax({
            // Uncomment the following to send cross-domain cookies:
            //xhrFields: {withCredentials: true},
            url: $('#fileupload').fileupload('option', 'url'),
            dataType: 'json',
            context: $('#fileupload')[0]
        }).always(function () {
            $(this).removeClass('fileupload-processing');
        }).done(function (result) {
            $(this).fileupload('option', 'done')
                .call(this, $.Event('done'), {result: result});
        });
    }

});
</div>

Where 'demo-test' is the hostname and ‘/server’ is the folder name that will have PHP upload handler file.

We will add php server-side file upload files into the server folder, You can get from Github Repo

You can download source code from the below link

Conclusion :

This jQuery file upload tutorial has single and multiple file uploads. You can also upload multiple images/files as well as delete them. It also supports drag and drop file upload of multiple files and images.