Dropzone.js - How to change file name before uploading to folder
I am using DropzoneJS script for uploading images with drag & drop, but now I'm looking for a solution for how to add current timestamps with file name before uploading to the server folder, because I am not able to upload the same image if the file already exists in the folder.
I have also referred below stackoverflow link but I'm confused where to implement this.
Here is dropzone.js script for reference
Answer
Please check following code I have implemented using PHP.
Use Following code in your index file
$(document).ready(function() {
Dropzone.autoDiscover = false;
var fileList = new Array;
var i =0;
$("#some-dropzone").dropzone({
addRemoveLinks: true,
init: function() {
// Hack: Add the dropzone class to the element
$(this.element).addClass("dropzone");
this.on("success", function(file, serverFileName) {
fileList[i] = {"serverFileName" : serverFileName, "fileName" : file.name,"fileId" : i };
//console.log(fileList);
i++;
});
this.on("removedfile", function(file) {
var rmvFile = "";
for(f=0;f<fileList.length;f++){
if(fileList[f].fileName == file.name)
{
rmvFile = fileList[f].serverFileName;
}
}
if (rmvFile){
$.ajax({
url: "http://localhost/dropzone/sample/delete_temp_files.php",
type: "POST",
data: { "fileList" : rmvFile }
});
}
});
},
url: "http://localhost/dropzone/sample/upload.php"
});
});
Upload.php
<?php
$ds = DIRECTORY_SEPARATOR; // Store directory separator (DIRECTORY_SEPARATOR) to a simple variable. This is just a personal preference as we hate to type long variable name.
$storeFolder = 'uploads'; // Declare a variable for destination folder.
if (!empty($_FILES)) {
$tempFile = $_FILES['file']['tmp_name']; // If file is sent to the page, store the file object to a temporary variable.
$targetPath = dirname( __FILE__ ) . $ds. $storeFolder . $ds; // Create the absolute path of the destination folder.
// Adding timestamp with image's name so that files with same name can be uploaded easily.
$date = new DateTime();
$newFileName = $date->getTimestamp().$_FILES['file']['name'];
$targetFile = $targetPath.$newFileName; // Create the absolute path of the uploaded file destination.
move_uploaded_file($tempFile,$targetFile); // Move uploaded file to destination.
echo $newFileName;
}
?>
delete_temp_files.php
<?php
$ds = DIRECTORY_SEPARATOR; // Store directory separator (DIRECTORY_SEPARATOR) to a simple variable. This is just a personal preference as we hate to type long variable name.
$storeFolder = 'uploads';
$fileList = $_POST['fileList'];
$targetPath = dirname( __FILE__ ) . $ds. $storeFolder . $ds;
if(isset($fileList)){
unlink($targetPath.$fileList);
}
?>
Hope this will be helpful for uploading images using ajax and delete using ajax :)
I have found from following references:
Dropzone.js- How to delete files from server? Dropzone.js remove button with php
Also add following code in your dropzone.js file after line #1110 for preventing user to upload duplicate files with same name :)
Dropzone.prototype.addFile = function(file) {
if (this.files.length) {
var _i, _len;
for (_i = 0, _len = this.files.length; _i < _len; _i++) {
if(this.files[_i].name === file.name && this.files[_i].size === file.size) {
return false;
}
}
}