Question

Have a form here with bunch of input text fields and a file upload input that can only accept multiple images.

What needs to happen:

After selecting a bunch of images and clicking Submit button – the controller should insert the text data into one table, then upload all the images and add their file names to the images table with foreign_key linking to the text data that was inserted, and finally make the first image, that was selected, turned into a thumbnail and upload its name and foreign_key linking to the text data row into thumbnails table too.

What happens:

Images+thumbnail get uploaded properly(or put into the upload folder without any duplicates and etc.), but for some reason the last image that was selected gets thumbnailed, not the first one.

Also, although only one image is thumbnailed – the database ends up adding name of every image, that were selected/uploaded, to the thumbnails table with _thumb in their names.

crud.php (controller)

function add()
        {
            //Set validation properties
            $this->_set_fields();

            //Set common properties
            $data['title'] = 'Add new data row';
            $data['message'] = '';
            $data['action'] = site_url('crud/addDataRow');
            $data['link_back'] = anchor('crud/index', 'Back to list', array('class' => 'back'));

            //Load the view
            $this->load->view('templates/header', $data);
            $this->load->view('pages/crud_edit', $data);
            $this->load->view('templates/footer');
        }

        function addDataRow()
        {
            //Set common properties
            $data['title'] = 'Add new data row';
            $data['action'] = site_url('crud/addDataRow');
            $data['link_back'] = anchor('crud/index/', 'Back to list', array('class' => 'back'));

            //Set validation properties
            $this->_set_fields();
            $this->_set_rules();

            //Run validation
            if($this->form_validation->run() == FALSE)
            {
                $data['message'] = '';
            }
            else
            {
                //Get the text data from $_POST
                $data_row = array(
                    'title' => $this->input->post('title'),
                    'text' => $this->input->post('text'),
                    'price' => $this->input->post('price'),
                    'status' => $this->input->post('status'),
                    'type' => $this->input->post('type')
                );

                //Insert text data into table
                $id = $this->crud_model->save($data_row);

                //Now move on to image processing
                //original image upload settings
                $config['allowed_types'] = 'gif|jpg|png';
                $config['max_size'] = '6000';
                $config['max_width']  = '1680';
                $config['max_height']  = '1050';
                $path_to_uploads= './assets/upload';
                $config['upload_path'] = $path_to_uploads;
                $this->load->library('upload', $config);

                $arr_files = @$_FILES['images'];

                $_FILES = array();
                foreach(array_keys($arr_files['name']) as $h){
                    $_FILES["file_{$h}"] = array(
                        'name' => $arr_files['name'][$h],
                        'type' => $arr_files['type'][$h],
                        'tmp_name' => $arr_files['tmp_name'][$h],
                        'error' => $arr_files['error'][$h],
                        'size' => $arr_files['size'][$h]
                    );
                }

                //add this
                $this->upload->initialize($config);

                foreach(array_keys($_FILES) as $h) {

                    if (!$this->upload->do_upload($h)){
                        $error = $this->upload->display_errors();
                        //echo "<script>alert($error);</script>";
                        print($error); die;
                    }else{

                        $upload_data=$this->upload->data();
                        $file_name=$upload_data['file_name'];
                        $full_file_path = $path_to_uploads.'/'.$file_name;

                        $image_row = array(
                        'id_path' => $file_name,
                        'id_data_row' => $id
                        );

                        //Upload original image
                        $this->crud_model->save_image($image_row);

                        if(current($_FILES) == $_FILES['file_0']){
                            //Thumbnail config
                            $config['image_library'] = 'gd2';
                            $config['source_image'] = $full_file_path;
                            $config['create_thumb'] = TRUE;
                            $config['maintain_ratio'] = TRUE;
                            $config['width'] = 150;
                            $config['height'] = 150;

                            $this->load->library('image_lib', $config);

                            $this->image_lib->resize();

                            $thumbnail_row = array(
                            'id_path' => str_replace(".", "_thumb.", $file_name),
                            'id_data_row' => $id
                            );

                            $this->crud_model->save_thumbnail($thumbnail_row);
                        }       
                    }
                }
                //Set form input name="id"
                $this->form_validation->id = $id;

                //Set user message
                $data['message'] = '<div class="success">New data row added!</div>';
            }

            $this->load->view('templates/header', $data);
            $this->load->view('pages/crud_edit', $data);
            $this->load->view('templates/footer');
        }

crud_model.php (model)

//Add new data row
        function save($data)
        {

            $this->db->insert($this->tbl_data, $data);
            return $this->db->insert_id();
        }

        //Add the original image
        function save_image($data)
        {
            $this->db->insert($this->tbl_images, $data);
            return $this->db->insert_id();
        }

        //Add the thumbnail upload path and id of the row in data table to link them
        function save_thumbnail($data)
        {
            $this->db->insert($this->tbl_thumbnails, $data);
            return $this->db->insert_id();
        }

Answer 1

It seems that your check is failing so the loop is running all the way through each time and overwriting the thumbnail with the last image looped.

Try changing your check from

if(current($_FILES) == $_FILES['file_0']){

to

if($h=='file_0'){