Codeigniter - Upload multiple files and displaying files - php

Question

My web app only allows for one file upload which is an issue because users want to be able to submit 2 or more files when necessary.
Please how do I allow multiple file uploads and displaying those files to be downloaded by another type of users?
MODEL
public function upload_docs($data)
{
$this->db->where('homework_id',$data['homework_id']);
$this->db->where('student_id',$data['student_id']);
$q = $this->db->get('submit_assignment');
if ( $q->num_rows() > 0 )
{
$this->db->where('homework_id',$data['homework_id']);
$this->db->where('student_id',$data['student_id']);
$this->db->update('submit_assignment',$data);
} else {
$this->db->insert('submit_assignment',$data);
}
}
CONTROLLER
public function upload_docs()
{
$homework_id = $_REQUEST['homework_id'];
$student_id =$_REQUEST['student_id'];
$data['homework_id'] = $homework_id;
$data['student_id'] = $student_id;
$data['message'] = $_REQUEST['message'];
// $data['id']=$_POST['assigment_id'];
$is_required=$this->homework_model->check_assignment($homework_id,$student_id);
$this->form_validation->set_rules('message', $this->lang->line('message'), 'trim|required|xss_clean');
$this->form_validation->set_rules('file', $this->lang->line('attach_document'), 'trim|xss_clean|callback_handle_upload['.$is_required.']');
if ($this->form_validation->run() == FALSE) {
$msg=array(
'message'=>form_error('message'),
'file'=>form_error('file'),
);
$array = array('status' => 'fail', 'error' => $msg, 'message' => '');
}else{
if (isset($_FILES["file"]) && !empty($_FILES['file']['name'])) {
$time = md5($_FILES["file"]['name'] . microtime());
$fileInfo = pathinfo($_FILES["file"]["name"]);
$img_name = $time . '.' . $fileInfo['extension'];
$data['docs'] = $img_name;
move_uploaded_file($_FILES["file"]["tmp_name"], "./uploads/homework/assignment/" . $data['docs']);
$data['file_name']=$_FILES["file"]['name'];
$this->homework_model->upload_docs($data);
}
$array = array('status' => 'success', 'error' => '', 'message' => $this->lang->line('success_message'));
}
echo json_encode($array);
}
public function handle_upload($str,$is_required)
{
$image_validate = $this->config->item('file_validate');
if (isset($_FILES["file"]) && !empty($_FILES['file']['name']) && $_FILES["file"]["size"] > 0) {
$file_type = $_FILES["file"]['type'];
$file_size = $_FILES["file"]["size"];
$file_name = $_FILES["file"]["name"];
$allowed_extension = $image_validate['allowed_extension'];
$ext = pathinfo($file_name, PATHINFO_EXTENSION);
$allowed_mime_type = $image_validate['allowed_mime_type'];
$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mtype = finfo_file($finfo, $_FILES['file']['tmp_name']);
finfo_close($finfo);
if (!in_array($mtype, $allowed_mime_type)) {
$this->form_validation->set_message('handle_upload', 'File Type Not Allowed');
return false;
}
if (!in_array($ext, $allowed_extension) || !in_array($file_type, $allowed_mime_type)) {
$this->form_validation->set_message('handle_upload', 'Extension Not Allowed');
return false;
}
if ($file_size > $image_validate['upload_size']) {
$this->form_validation->set_message('handle_upload', $this->lang->line('file_size_shoud_be_less_than') . number_format($image_validate['upload_size'] / 1048576, 2) . " MB");
return false;
}
return true;
} else {
if($is_required==0){
$this->form_validation->set_message('handle_upload', 'Please choose a file to upload.');
return false;
}else{
return true;
}
}
}
VIEW
<form id="upload" role="form" method="post" class="ptt10" enctype="multipart/form-data" action="upload_docs">
<div class="modal-body pt0">
<div class="row">
<input type="hidden" name="student_id" value="<?php echo $student_id; ?>">
<input type="hidden" id="homework_id" name="homework_id">
<input type="hidden" id="assigment_id" name="assigment_id">
<div class="col-sm-12">
<div class="form-group">
<label for="pwd"><?php echo $this->lang->line('message'); ?></label>
<textarea type="text" id="assigment_message" name="message" class="form-control "></textarea>
</div>
</div>
<div class="col-sm-12">
<div class="form-group">
<label for="pwd"><?php echo $this->lang->line('attach_document'); ?></label>
<input type="file" id="file" name="file" class="form-control filestyle">
</div>
</div>
<p id="uploaded_docs"></p>
</div>
</div>
<div class="box-footer">
<div class="" id="footer_area">
<button type="submit" form="upload" class="btn btn-info pull-right" id="submit" data-loading-text='Please wait...'><?php echo $this->lang->line('save'); ?></button>
</div>
</div>
</form>
This is displayed like this
controller
public function assigmnetDownload($doc)
{
$this->load->helper('download');
$name = $this->uri->segment(5);
$ext = explode(".", $name);
$filepath = "./uploads/homework/assignment/" . $doc;
$data = file_get_contents($filepath);
force_download($name, $data);
}
view
<table class="table table-hover table-striped table-bordered example">
<thead>
<tr>
<th><?php echo $this->lang->line('name') ?></th>
<th><?php echo $this->lang->line('message') ?></th>
<th class="text-right"><?php echo $this->lang->line('action') ?></th>
</tr>
</thead>
<tbody id="homework_docs_result">
</tbody>
</table>
Thanks to all helping me out. I did as you guys directed. However, I noticed I'm able to select multiple files now but gets stuck on the save button.
When I click, nothing happens. Data is not submitted.
This is what I have done so far
controller
if (isset($_FILES["file"])){
foreach($_FILES["file"] as $file){
if(!empty($file["name"])){
$time = md5($file["file"]['name'] . microtime());
$fileInfo = pathinfo($file["file"]["name"]);
$img_name = $time . '.' . $fileInfo['extension'];
$data['docs'] = $img_name;
move_uploaded_file($file["file"]["tmp_name"], "./uploads/homework/assignment/" . $data['docs']);
$data['file_name']=$file["file"]['name'];
$this->homework_model->upload_docs($data);
}
$array = array('status' => 'success', 'error' => '', 'message' => $this->lang->line('success_message'));
}
echo json_encode($array);
}
}
}
view
<form id="upload" role="form" method="post" class="ptt10" enctype="multipart/form-data" action="uploaded_docs">
<input type="file" multiple="" id="file" name="file[]" class="form-control filestyle">
<button type="submit" form="upload" class="btn btn-info pull-right" id="submit" data-loading-text=' Please wait'><?php echo $this->lang->line('save'); ?></button>
</form>

Answer 1

HTML
<input type="file" id="file" name="file[]" class="form-control filestyle">
Setting name to file[] will accept array of files
PHP
if (isset($_FILES["file"]){
foreach($_FILES["file"] as $file){ //this loop will get one file from 'file[]' array at a time
if(!empty($file["name"])){
//your alreay written code
//replace $_FILES["file"] with $file
}
}
}
Hope this helpful :)

Answer 2

Some tips, if help. Do not forget the vote to strengthen. Let's go...
<form method="post" action="upload_docs" enctype="multipart/form-data">
<input name="filesToUpload[]" type="file" multiple="" />
</form>
On your controller it's simple ...
if(isset($_FILES['filesToUpload'])) {
foreach ($_FILES['filesToUpload'] as $fileUp) {
$time = md5($fileUp["file"]['name'].microtime());
$fileInfo = pathinfo($fileUp["file"]["name"]);
$img_name = "{$time}.{$fileInfo['extension']}";
$data['docs'] = $img_name;
move_uploaded_file($fileUp["file"]["tmp_name"], "./uploads/homework/assignment/{$data['docs']}");
$data['file_name']=$fileUp["file"]['name'];
$this->homework_model->upload_docs($data);
}
}
To display multiple files you need to use the same concept as uploading working with
foreach($files as $file){ ... }
I hope I helped. Success!

Answer 3

Setting attribute multiple will allow selecting multiple files at once by pressing ctrl, setting the name as an array(file[]) will allow more than files name to be stored.
<input type="file" id="file" name="file[]" class="form-control filestyle" multiple>
However, if you don't want the user to upload multiple files at once then you'll have to make multiple input fields with the same name as an array(file[])
<input type="file" id="file" name="file[]" class="form-control filestyle">
<input type="file" id="file1" name="file[]" class="form-control filestyle">
...
...
In your controller, you'll have to traverse through each element as it is now an array.
foreach($_FILES["file"]['name'] as $file){ //single element
echo $file; // returns the name of file
// your-logic-to-upload
}
If you're having trouble uploading multiple files, see here, here and here.
Hope it helps you.