data not setting in session codeigniter - php

Question

//uploading product movie or image?
if($this->input->post('upload_360') == "Upload") {
$config['upload_path'] = './media/images/products/360s';
$config['allowed_types'] = 'swf';
$this->load->library('upload', $config);
$this->upload->initialize($config);
if (!$this->upload->do_upload('film')) {
$this->data['product_error'] = $this->upload->display_errors();
$this->template->build('/admin/products/create', $this->data);
} else {
$this->data['data_360'] = $this->upload->data();
$this->session->set_userdata(array('360_film' => $this->data['data_360']));
$this->template->build('/admin/products/create', $this->data);
}
$this->session->set_userdata(array('advantages' => $this->input->post('product_advantages')));
$this->data['session_advantages'] = $this->session->userdata('advantages');
}
//upload the product image, if successful the user will be
//notified if the image is too high or wide, and will be offered,
//the chance to crop the image. All cropping takes place in the media
//controller.
if($this->input->post('product_image') == "Upload") {
$config['upload_path'] = './media/images/products/';
$config['allowed_types'] = 'gif|jpg|jpeg|png';
$this->load->library('upload', $config);
$this->upload->initialize($config);
if (!$this->upload->do_upload('image_upload')) {
//die("!");
$this->data['image_error'] = $this->upload->display_errors();
$this->template->build('/admin/products/create', $this->data);
} else {
$this->data['image_data'] = $this->upload->data();
$this->session->set_userdata(array('image' => $this->data['image_data']));
$this->data['session_image'] = $this->session->userdata('image');
$this->template->build('/admin/products/create', $this->data);
}
$this->session->set_userdata(array('advantages' => $this->input->post('product_advantages')));
$this->data['session_advantages'] = $this->session->userdata('advantages');
}
if($this->input->post('screenshot_upload') == "Upload") {
$config['upload_path'] = './media/images/products/360s/screenshots/';
$config['allowed_types'] = 'gif|jpg|jpeg|png';
$this->load->library('upload', $config);
$this->upload->initialize($config);
if (!$this->upload->do_upload('screenshot')) {
//die("!");
$this->data['screenshot_error'] = $this->upload->display_errors();
$this->template->build('/admin/products/create', $this->data);
} else {
$this->data['screenshot_data'] = $this->upload->data();
$this->session->set_userdata(array('screenshot' => $this->data['screenshot_data']));
$this->data['session_screenshot'] = $this->session->userdata('screenshot');
$this->template->build('/admin/products/create', $this->data);
}
$this->session->set_userdata(array('advantages' => $this->input->post('product_advantages')));
$this->data['session_advantages'] = $this->session->userdata('advantages');
}
On my form I have the user choose a file and the click an upload button dependent on which button is clicked the file gets uploaded and the upload data gets saved in a session.
The session is then used to get data from to save to a database, the upload_360 session works, the product_image session works fine but the screenshot_upload session only has data when with the if statement (3rd one in the code) if I try and acccess it outside of the code then that portion of the session is empty?
Is there a reason for this?

Answer 1

Why are you storing data in a session before inserting it into the db?
Cookies can only hold 4KB of data...
but the screenshot_upload session only has data when with the if statement (3rd one in the code) if I try and acccess it outside of the code then that portion of the session is empty?
I don't understand that part of your question. Do you mean it only has data when only using the 3rd if statement? i.e. when only trying to do screenshot_upload and not product_image or 360_upload`? If so, that might speak to the cookie size limit.
Instead of
$this->session->set_userdata(array('screenshot' => $this->data['screenshot_data']));
$this->data['session_screenshot'] = $this->session->userdata('screenshot');
why don't you
$this->uploads_model->insert_screenshot_data($this->data['screenshot_data']);//send screenshot upload_data to model to be inserted into db
$this->data['screenshot_data'] = $this->data['screenshot_data'];//if you want to pass screenshot upload_data to template/view
?

Answer 2

It looks like you are sending output to the user before setting the session (I'm inferring this from the $this->template->build, which is custom code.)
The session, like headers, cannot be modified after anything (ANYTHING) has been sent to output. This is because the session itself is sent in the header.