Resumable Upload with ng-file-upload + PHP (Merging parts) - php

Question

I'm trying to implement ng-file-upload with Resumable Uploads mode to split big files in chunks and merge them once uploaded. I have implemented ng-file-upload in many projects but it's my first time doing it to upload so big files.
My issue is that I don't know how to make it work the server side files in PHP. I've just got to upload chunks with diferents name but I can't merge them.
Could anybody post an example of server side code in PHP to make work this feature?
This is what I have done up to this point:
AngularJS
$scope.uploadMediaFile = function (file) {
if(file) {
Upload.upload({
ignoreLoadingBar: true,
url: 'app/api/upload/mediaFile.php',
resumeChunkSize: '1MB',
file: file
}).then(function (response) {
if(response.data.success) {
$scope.post.mediaFile = response.data.filename;
$scope.post.duration = response.data.duration;
} else {
console.error(response.data.error);
}
}, null, function (evt) {
console.log(part);
file.progress = Math.min(100, parseInt(100.0 * evt.loaded / evt.total));
});
}
};
mediaFile.php
$filename = $_FILES['file']['name'];
$file_tmp = $_FILES['file']['tmp_name'];
$file_ext = pathinfo($filename, PATHINFO_EXTENSION);
$file_des = $_SERVER['DOCUMENT_ROOT'] . '/storage/content/temp/';
if(!file_exists($file_des)) mkdir($file_des);
// Puting a diferent name for each file part
$new_filename = uniqid() . "." . pathinfo($filename, PATHINFO_EXTENSION);
move_uploaded_file($file_tmp, $file_des . $new_filename)
So far, I get many pieces of same file with diferent names.

Answer 1

Just in case someone is looking similar question, I post my solution.
<?php
// File chunk
$filename = $_FILES['file']['name'];
$file_tmp = $_FILES['file']['tmp_name'];
// Defining temporary directory
$file_des = $_SERVER['DOCUMENT_ROOT'] . '/storage/content/temp/';
// If not exists, create temp dir.
if(!file_exists($file_des)) mkdir($file_des);
// The first chunk have the original name of file uploaded
// so, if it exists in temp dir, upload the other pieces
// with anothers uniques names
if(file_exists($file_des . $filename)) {
$new_name = uniqid() . "." . pathinfo($filename, PATHINFO_EXTENSION);
move_uploaded_file($file_tmp, $file_des . $new_name);
// Now, append the chunk file to the first base file.
$handle = fopen($file_des . $new_name, 'rb');
$buff = fread($handle, filesize($file_des . $new_name));
fclose($handle);
$final = fopen($file_des . $filename, 'ab');
$write = fwrite($final, $buff);
fclose($final);
// Delete chunk
unlink($file_des . $new_name);
} else {
/* MAKE SURE WE DELETE THE CONTENT OF THE DESTINATION FOLDER FIRST,
OTHERWISE CHUNKS WILL BE APPENDED FOR EVER
IN CASE YOU ARE TRYING TO UPLOAD A FILE WITH THE EXACT SAME NAME.
CAREFUL: YOU MAY PREFER TO DELETE ONLY THE FILE
INSTEAD OF THE FOLDER'S CONTENT, IN THE CASE
YOUR FOLDER CONTAINS MORE THAN ONE FILE.
*/
$files_to_delete = glob($file_des."*"); // get all file names
foreach($files_to_delete as $file) // iterate files
{
if(is_file($file))
{
unlink($file); // delete file
}
}
// First chunk of file with original name.
move_uploaded_file($file_tmp, $file_des . $filename);
}