Codeigniter Rename file on upload

Question

I\'m trying to add time as the prefix of the image name along with the original name when uploading, But I couldn\'t figure it out. Please help me with the following code to

Answer 1

For some reasons, consecutive calls to the do_upload function doesn't work. It sticks to the first filename set by the first function call

$small_photo_url  = $this->upload_photo('picture_small',  $this->next_id.'_small ');
$medium_photo_url = $this->upload_photo('picture_medium', $this->next_id.'_medium');
$large_photo_url  = $this->upload_photo('picture_large',  $this->next_id.'_large ');

The filenames will all be "00001_small", "00001_small1", "00001_small2" given the following configurations

function upload_photo($field_name, $filename)
{
    $config['upload_path'] = 'Public/uploads/';
    $config['allowed_types'] = 'gif|jpg|png';
    $config['max_size'] = '1024';
    $config['max_width']  = '1024';
    $config['max_height']  = '768';
    $config['file_name'] = $filename;

    $this->load->library('upload', $config);

    if ( ! $this->upload->do_upload())...

I think it's because this line doesn't work the second time you call it. It does not set the configurations again

$this->load->library('upload', $config);

========================================================================== Solution to the problem faced during consecutive do_upload function calls:

// re-initialize upload library
$this->upload->initialize($config);