Multiple file upload

[eluser]Thiago Leao[/eluser]
please, i need to Multiple file upload.

I have code, with upload simple, that generates two images, one at 800x600 and another 100x75

Code:

<?php
class Upload extends Controller {

  function go() {
    if(isset($_POST['upload'])) {
        
        $dia = date("Y-m");  
        $diretorio = 'assets/uploads/'.$dia.'/';
        
        if(!is_dir($diretorio)){
            mkdir($diretorio, 0777, TRUE);
            chmod($diretorio, 0777);
        }
        
        $config['upload_path'] = $diretorio;
        $config['allowed_types'] = 'gif|jpg|jpeg|png';
        $config['remove_spaces'] = TRUE;
        $config['encrypt_name'] = TRUE;
        $config['max_size'] = '8192'; // 8Mbs
        
        $this->load->library('upload', $config);
        $this->upload->initialize($config);
        
        $this->upload->do_upload();    
        $image_data = $this->upload->data();
        
        $configLarge = array(
            'source_image' => $image_data['full_path'],
            'new_image' => $diretorio,
            'master_dim' => 'auto',
            'maintain_ratio' => true,
            'width' => 800,
            'height' => 600
        );
        
    
        $this->load->library('image_lib');
        $this->image_lib->initialize($configLarge);
        $this->image_lib->resize();        
        $this->image_lib->clear();
        
        $configThumb = array(
            'source_image' => $image_data['full_path'],
            'new_image' => $diretorio.'/'.substr($image_data['file_name'], 0, -4).'_thumb.'.end(explode(".", $image_data['file_name'])),
            'maintain_ratio' => true,
            'master_dim' => 'auto',
            'width' => 150,
            'height' => 150
        );        
    
        $this->image_lib->initialize($configThumb);
        $this->image_lib->resize();
            
    }
  }
}
?>

could someone help me how to do Multiple upload, please?
thanks!