"The upload path does not appear to be valid" Codeigniter image upload - php

Question

This has been asked a lot but after trying a number of things, I still can't find a solution to my cause of this issue.
I'm autoloading the upload library.
My folder structure is:
/application/
/assets/
css/
images/
hero/
js/
/system/
My controller:
$fileName = $this->input->post('title') . '_hero';
$filePath = './assets/images/hero/';
$config['allowed_types'] = 'gif|jpg|png';
$config['overwrite'] = true;
$this->upload->initialize($config);
if (!empty($_FILES['heroimage'])) {
$config['file_name'] = $fileName;
$config['upload_path'] = $filePath;
if (!$this->upload->do_upload('heroimage')) {
$error = array('error' => $this->upload->display_errors());
var_dump($error);
} else {
$data = array('upload_data' => $this->upload->data());
var_dump($data);
}
}
I have tried initializing both how it is now and using $this->load->library('upload', $config); but neither have worked.
I have also checked if the directory exists and if it is writable and both returned true.
Another thing I tried was setting the upload path to $config['upload_path'] = FCPATH.'assets\images\hero';
Any help pointing me in the right direction would be appreciated.

Answer 1

You should have config data like because the file path was not initialized
https://www.codeigniter.com/user_guide/libraries/file_uploading.html#setting-preferences
$fileName = $this->input->post('title') . '_hero';
$filePath = './assets/images/hero/';
$config['upload_path'] = $filePath;
$config['allowed_types'] = 'gif|jpg|png';
$config['overwrite'] = true;
$this->upload->initialize($config);
if (!empty($_FILES['heroimage'])) {
if (!$this->upload->do_upload('heroimage')) {
// errors
} else {
$upload_data = $this->upload->data();
echo $upload_data['file_name'];
}
}