How to delete images from folder in Codeigniter - php

Question

Today My teacher in my college give me a task about CodeIgniter, he gives me this Controller
public function __construct()
{
parent::__construct();
$this->load->model('Gallery_model');
$this->load->helper(['url','html','form']);
$this->load->database();
$this->load->library(['form_validation','session','image_lib']);
}
public function index()
{
$data = ['images' => $this->Gallery_model->all()];
$this->load->view($this->layoutgaleri, $data);
}
public function add(){
$rules = [
[
'field' => 'caption',
'label' => 'Caption',
'rules' => 'required'
],
[
'field' => 'description',
'label' => 'Description',
'rules' => 'required'
]
];
$this->form_validation->set_rules($rules);
if ($this->form_validation->run() == FALSE)
{
$this->load->view('admin/layoutgaleriadd');
}
else
{
/* Start Uploading File */
$config = [
'upload_path' => './asset/images/',
'allowed_types' => 'gif|jpg|png',
'max_size' => 2000,
'max_width' => 640,
'max_height' => 480
];
$this->load->library('upload', $config);
if ( ! $this->upload->do_upload())
{
$error = array('error' => $this->upload->display_errors());
$this->load->view('admin/layoutgaleriadd', $error);
}
else
{
$file = $this->upload->data();
//print_r($file);
$data = [
'file' => 'asset/images/' . $file['file_name'],
'caption' => set_value('caption'),
'description' => set_value('description')
];
$this->Gallery_model->create($data);
$this->session->set_flashdata('message','Gambar sudah ditambahkan..');
redirect('admin/Galeri');
}
}
}
public function edit($id){
$rules = [
[
'field' => 'caption',
'label' => 'Caption',
'rules' => 'required'
],
[
'field' => 'description',
'label' => 'Description',
'rules' => 'required'
]
];
$this->form_validation->set_rules($rules);
$image = $this->Gallery_model->find($id)->row();
if ($this->form_validation->run() == FALSE)
{
$this->load->view('admin/layoutgaleriedit',['image'=>$image]);
}
else
{
if(isset($_FILES["userfile"]["name"]))
{
/* Start Uploading File */
$config = [
'upload_path' => './asset/images/',
'allowed_types' => 'gif|jpg|png',
'max_size' => 2000,
'max_width' => 640,
'max_height' => 480
];
$this->load->library('upload', $config);
if ( ! $this->upload->do_upload())
{
$error = array('error' => $this->upload->display_errors());
$this->load->view('admin/layoutgaleriedit',['image'=>$image,'error'=>$error]);
}
else
{
$file = $this->upload->data();
$data['file'] = 'asset/images/' . $file['file_name'];
unlink($image->file);
}
}
$data['caption'] = set_value('caption');
$data['description'] = set_value('description');
$this->Gallery_model->update($id, $data);
$this->session->set_flashdata('message','Gambar sudah diperbarui..');
redirect('admin/galeri');
}
}
public function delete($id)
{
$this->Gallery_model->delete($id);
$this->session->set_flashdata('message','Gambar sudah dihapus..');
redirect('admin/galeri');
}
The problem is we had to create a model that handle function delete, so it can delete a photo from the folder too, here it's the model
public function delete($id)
{
try {
$this->db->where('id',$id)->delete('tb_gambar');
return true;
}
//catch exception
catch(Exception $e) {
echo $e->getMessage();
}
}
He gives us a hint to use unlink, but I don't have any idea how to use it, so I try to ask you all for the answer. I hope you all can show me the right answer for my school task

Answer 1

You can delete image from DB and folder in the one function:
public function delete($id)
{
$image = $this->Gallery_model->find($id)->row();
// delete image
if (is_file('image_path/'.$image->file)) {
unlink('image_path/'.$image->file);
}
$this->Gallery_model->delete($id);
$this->session->set_flashdata('message','Gambar sudah dihapus..');
redirect('admin/galeri');
}

Answer 2

in controller :
public function delete($id)
{
$image = $this->Gallery_model->find($id)->row();
$this->Gallery_model->delete($id);
// use
delete_files(FCPATH.$image->file); // codeigniter method to delete file
// or use php method
// unlink(FCPATH.$image->file); // php unlink method
$this->session->set_flashdata('message','Gambar sudah dihapus..');
redirect('admin/galeri');
}

Answer 3

if(file_exists(FCPATH.$image->file))
{
unlink(FCPATH.$image->file);
}

Answer 4

here is my delete function and it works
public function delete($id){
$image = $this->M_sizechart->find($id)->row();
$this->M_sizechart->delete($id);
if(file_exists(FCPATH.$image->file)) {
unlink(FCPATH.$image->file);
}
$this->session->set_flashdata('message','Image has been deleted..');
redirect(base_url("sizechart"));
}