Remote Image to Local

// Add Shortcode
function get_remote_shortcode( $atts , $content = null ) {

	// Attributes
	$atts = shortcode_atts(
		array(
			'file' => '',
			'post_id' => '',
		),
		$atts
	);

	$img = media_sideload_image( $file, $post_id );
		if(is_wp_error($img)) {
	    echo $img->get_error_message();
	    return;
		} else {
			return $img;
		}

}
add_shortcode( 'get_remote', 'get_remote_shortcode' );