image upload with codeigniter - codeigniter

Question

Am having difficulties uploading images with codeigniter it keeps saying that i didn't select a file to upload.
this is my code
function do_upload()
{
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'jpg|png';
$config['max_size'] = '3000';
$config['max_width'] = '1024';
$config['max_height'] = '768';
$this->load->library('upload', $config);
if (!$this->upload->do_upload()){
echo $this->upload->display_errors();
}else{
echo $this->upload->data();
}
}
it doesn't even send the image to the directory.

Answer 1

try this function instead :
function upload_done() {
$config['overwrite'] = TRUE;
$config['encrypt_name'] = FALSE;
$config['remove_spaces'] = TRUE;
$config['upload_path'] = '/var/www/uploadfiles/'; // use an absolute path
$config['allowed_types'] = 'jpg|png';
$config['max_size'] = '0';
if ( ! is_dir($config['upload_path']) ) die("THE UPLOAD DIRECTORY DOES NOT EXIST");
$this->load->library('upload',$config);
if ( ! $this->upload->do_upload() )
{
echo "UPLOAD ERROR ! ".$this->upload->display_errors();
} else {
echo "THE IMAGE HAS BEEN UPLOADED : "; var_dump( $this->upload->data() );
}
}

Answer 2

Make sure your html looks like below.
<input type="file" name="userfile" size="20" />
Codeigniter's upload library assumes the name to be "userfile"

Answer 3

You need to change the call to do_upload() depending on the name you have given the form input. Lets say you have this code in your HTML:
<input type="file" name="image" />
You need to change:
$this->upload->do_upload()
to
$this->upload->do_upload('image')
By default CodeIgniter assumes the name is "userfile".