How to update images with codeigniter - php

Question

I have a problem when I want to update the image.
the update process went well, but the image cannot update.
Please help. Thanks.
Here is View :
<?php echo form_open('update'); ?>
<input type="hidden" name="id" value="<?php echo $data->id; ?>">
<input type="hidden" id="old" name="old" value="<?php echo $data->image;?>">
<div class="form-group">
<label>Name</label>
<input type="text" class="form-control" name="name" value="<?php echo $data->name; ?>">
</div>
<div class="form-group">
<label>Change Image</label>
<input class="form-control" type="file" name="image">
</div>
<button type="submit" class="btn btn-default">Submit</button>
Here is Controller :
public function Update(){
$id = $this->input->post('id');
$name = $this->input->post('name');
if($_FILES['image']['name']!=""){
$config['upload_path'] = './image/';
$config['allowed_types'] ='gif|jpg|png|jpeg|';
$this->load->library('upload', $config);
if(!$this->upload->do_upload('image')){
$error = array('error' => $this->upload->display_errors());
}else{
$upload_data=$this->upload->data();
$image_name =$upload_data['file_name'];
}
}else{
$image_name=$this->input->post('old');
}
$data = array( 'name' => $name, 'image' => $image_name, );
$this->model_user->update_user($data,$id);
}
Here is Model :
public function update_user($data, $id)
{
$this->db->where('id', $id);
$this->db->update('tabel_user', $data);
return TRUE;
}

Answer 1

you code dose not have any mistake. but you use some unwanted input.
try to debug your code.
in model
before return
public function update_user($data, $id)
{
$this->db->where('id', $id);
$this->db->update('tabel_user', $data);
echo $this->db->last_query();
echo "</br> id : ".$id;
print_r($data); EXIT;
}
if you get get query printed. check what you have missed. if you don't
at controller
after line $error = array('error' => $this->upload->display_errors());
put print_r($error); exit;
and may be you have forgotten to mention multi part at your view.
do these three things hope you will find what is wrong.

Answer 2

First, check your column names are same as array key values
Try These,
public function update_user($data, $id)
{
echo'<pre>';print_r($data);
$this->db->where('id', $id);
$flag = $this->db->update('tabel_user', $data);
echo $flag;die;
}
$flag will tell you True or False