Upload File

[controller]
 $config = array(
            'upload_path'       => './resources/uploads'
            , 'allowed_types'   => 'gif|jpg|png'
            , 'max_size'        => '1000000000'
            , 'max_width'       => '2048'
            , 'max_height'      => '1024'
        );

        $this->upload->initialize($config);

$pic        = '';

        if (isset($_FILES["userfile"]["name"])){
            if ( ! $this->upload->do_upload()){

            }else{
                $tGambar    = $this->upload->data();
                $pic        = $tGambar["file_name"];
            }
        }else{
            $pic        = '';
        }


[view]
<?php
$attributes = array('class' => 'form_container', 'id' => 'myform');
echo form_open_multipart('administrator/item/do_item',$attributes);
?>
<input type="file" name="userfile" id="userfile" class="file_1" />
<?php echo '</form>';?>