Télécharger des images multiples à l'aide d'AJAX, PHP et jQuery

Essayer en utilisant json à télécharger , processus de file objet

html

<div id="drop" class="drop-area ui-widget-header">
<div class="drop-area-label">Drop image here</div>
</div>
<br />
<form id="upload">
<input type="file" name="file" id="file" multiple="true" accepts="image/*" />
<ul class="gallery-image-list" id="uploads">
<!-- The file uploads will be shown here -->
</ul>
</form>
<div id="listTable"></div>

css

  #uploads {
display:block;
position:relative;
} 
#uploads li {
list-style:none;
}
#drop {
width: 90%;
height: 100px;
padding: 0.5em;
float: left;
margin: 10px;
border: 8px dotted grey;
}
#drop.hover {
border: 8px dotted green;
}
#drop.err {
border: 8px dotted orangered;
}

js

var display = $("#uploads"); //cache `#uploads`, `this` at `$.ajax()`
var droppable = $("#drop")[0]; //cache `#drop` selector
$.ajaxSetup({
context: display,
contentType: "application/json",
dataType: "json",
beforeSend: function (jqxhr, settings) {
//pre-process `file`
var file = JSON.parse(
decodeURIComponent(settings.data.split(/=/)[1])
);
//add `progress` element for each `file`
var progress = $("<progress />", {
"class": "file-" + (!!$("progress").length 
? $("progress").length 
: "0"),
"min": 0,
"max": 0,
"value": 0,
"data-name": file.name
});
this.append(progress, file.name + "<br />");
jqxhr.name = progress.attr("class"); 
}
});
var processFiles = function processFiles(event) {
event.preventDefault();
//process `input[type=file]`, `droppable` `file`
var files = event.target.files || event.dataTransfer.files;
var images = $.map(files, function (file, i) {
var reader = new FileReader();
var dfd = new $.Deferred();
reader.onload = function (e) {
dfd.resolveWith(file, [e.target.result])
};
reader.readAsDataURL(new Blob([file], {
"type": file.type
}));
return dfd.then(function (data) {
return $.ajax({
type: "POST",
url: "/echo/json/",
data: {
"file": JSON.stringify({
"file": data,
"name": this.name,
"size": this.size,
"type": this.type
})
},
xhr: function () {
//do `progress` event stuff
var uploads = this.context;
var progress = this.context.find("progress:last");
var xhrUpload = $.ajaxSettings.xhr();
if (xhrUpload.upload) {
xhrUpload.upload.onprogress = function (evt) {
progress.attr({
"max": evt.total,
"value": evt.loaded
})
};
xhrUpload.upload.onloadend = function (evt) {
var progressData = progress.eq(-1);
console.log(progressData.data("name")
+ " upload complete...");
var img = new Image;
$(img).addClass(progressData.eq(-1)
.attr("class"));
img.onload = function () {
if (this.complete) {
console.log(
progressData.data("name")
+ " preview loading..."
);
};
};
uploads.append("<br /><li>", img, "</li><br />");
};
}
return xhrUpload;
}
})
.then(function (data, textStatus, jqxhr) {
console.log(data)
this.find("img[class=" + jqxhr.name + "]")
.attr("src", data.file)
.before("<span>" + data.name + "</span><br />");
return data
}, function (jqxhr, textStatus, errorThrown) {
console.log(errorThrown);
return errorThrown
});
})
});
$.when.apply(display, images).then(function () {
var result = $.makeArray(arguments);
console.log(result.length, "uploads complete");
}, function err(jqxhr, textStatus, errorThrown) {
console.log(jqxhr, textStatus, errorThrown)
})
};
$(document)
.on("change", "input[name^=file]", processFiles);
//process `droppable` events
droppable.ondragover = function () {
$(this).addClass("hover");
return false;
};
droppable.ondragend = function () {
$(this).removeClass("hover")
return false;
};
droppable.ondrop = function (e) {
$(this).removeClass("hover");
var image = Array.prototype.slice.call(e.dataTransfer.files)
.every(function (img, i) {
return /^image/.test(img.type)
});
e.preventDefault();
//if `file`, file type `image` , process `file`
if (!!e.dataTransfer.files.length && image) {
$(this).find(".drop-area-label")
.css("color", "blue")
.html(function (i, html) {
$(this).delay(3000, "msg").queue("msg", function () {
$(this).css("color", "initial").html(html)
}).dequeue("msg");
return "File dropped, processing file upload...";
});
processFiles(e);
} else {
//if dropped `file` _not_ `image`
$(this)
.removeClass("hover")
.addClass("err")
.find(".drop-area-label")
.css("color", "darkred")
.html(function (i, html) {
$(this).delay(3000, "msg").queue("msg", function () {
$(this).css("color", "initial").html(html)
.parent("#drop").removeClass("err")
}).dequeue("msg");
return "Please drop image file...";
});
};
};

php

<?php
if (isset($_POST["file"])) {
//do php stuff
//call `json_encode` on `file` object
$file = json_encode($_POST["file"]);
//return `file` as `json` string
echo $file;
};

jsfiddle http://jsfiddle.net/guest271314/0hm09yqo/