Pouvez vous m'aider a lire qq ligne de codes?

 /**
     * Adds image
     *
     * @param OCSSLIDER_BOL_Image $image
     * @return int
     */
    public function addImage( OCSSLIDER_BOL_Image $image, $file )
    {
        $this->imageDao->save($image);

        $path = $this->getImagePath($image->id, $image->hash, $image->ext);
        
        if ( !move_uploaded_file($file['tmp_name'], $path) )
        {
        	$this->imageDao->deleteById($image->id);
        	
        	return false;
        }
        
        return $image->id;
    }