Codeigniter profile image upload - php

Question

Codeigniter when i update the form others are updating but image path disappears
Form Submit
user name update
password update
image url delete
Form Submit
user name update
password update
Not -> image url delete
CONTROLLER
public function profil_guncelle($id)
{
if(!empty($_FILES['avatar']['name'])){
$config['upload_path'] = 'uploads';
$config['allowed_types'] = 'jpg|jpeg|png|gif';
$config['width'] = 150;
$config['height'] = 50;
$config['file_name'] = $_FILES['avatar']['name'];
$this->load->library('upload',$config);
$this->upload->initialize($config);
if($this->upload->do_upload('avatar')){
$uploadData = $this->upload->data();
$picture = $uploadData['file_name'];
}else{
$picture = '';
}
}else{
$picture = '';
}
$this->form_validation->set_rules('user_pass', 'Parola', 'trim|required');
$this->form_validation->set_rules('user_mail', 'E-Posta', 'trim|required');
if ($this->form_validation->run() == FALSE) {
$this->session->set_userdata('profil_guncelle', validation_errors());
$upload_error = array('error' => $this->upload->display_errors());
redirect(base_url().'admin/users/profil/'.$id);
}else{
$data=array(
'user_pass' => $this->input->post('user_pass'),
'user_mail' => $this->input->post('user_mail'),
'avatar' => $picture
);
if ($this->Database_Model->profil_guncelle($data, $id) ==true) {
$this->session->set_flashdata('profil_guncelle', 'Bilgileriniz başarıyla güncellendi.');
redirect(base_url().'admin/users/profil/'.$id);
}
}
}
}
DATABASE MODEL
public function profil_guncelle($data, $id){
$this->db->set($data);
$this->db->where('id', $id);
if ($this->db->update('users') ===true) {
return true;
}else{
return false;
}
}

Answer 1

First you are set $picture become '' if $_FILES['avatar']['name'] is empty.
than when you are trying update data
$data=array(
'user_pass' => $this->input->post('user_pass'),
'user_mail' => $this->input->post('user_mail'),
'avatar' => $picture
);
of course $picture will be set to '' if the images files are empty. you change the array become :
$data=array(
'user_pass' => $this->input->post('user_pass'),
'user_mail' => $this->input->post('user_mail'),
);
if($picture != ''){
$data['avatar'] = $picture;
}