Codeigniter two file upload, one mandatory and one optional - php

Question

I am trying to upload two files with the help of codeigniter functions.
One of the file should be mandatory and one should be optional.
I am using the code below to upload those files but I cannot figure out the way to make one optional and one mandatory. I tried few modifications to the code below, but i bumped into many errors. I am new to codeigniter.
Even the code below for handling the uploads may not be appropriate but it is working.
$config['upload_path'] = 'uploads/';
$path=$config['upload_path'];
$config['allowed_types'] = '*';
$this->load->library('upload');
$i=0;
foreach ($_FILES as $key => $value)
{
if (!empty($key['name']))
{
$this->upload->initialize($config);
if (!$this->upload->do_upload($key))
{
$errors = $this->upload->display_errors();
$this->session->set_flashdata('error', $errors);
redirect(base_url().'upload', 'refresh');
}
else
{
$data = array('upload_data' => $this->upload->data());
$p[$i] = $this->upload->data();
}
}
$i++;
} //endforeach
if(empty($errors)){
//if there are no errors, write it into the database
$data = array('user_id'=>$this->session->userdata('id'),
'name'=>$this->input->post('name'),
'screenshot'=>$p[1]['file_name'],
'model'=> $p[0]['file_name'],
'created'=>date('Y-m-d H:i:s')
);
if($this->usermodel_model->save($data)){
//success
redirect(base_url().'dashboard?success');
}else{
//failed
redirect(base_url().'upload');
}
}

Answer 1

Sohanmax put $i++; inside if (!empty($key['name'])){ } and after ending foreach check if($i !=0) if it's false show the error, hope it'll work.