public function get_file_size( $file = false ) {
	if( $file ) {
		$data = wp_remote_head( $file );
		if ( is_wp_error( $data ) ) {
   				$error_string = $data->get_error_message();
   				echo '<div id="message" class="error"><p>' . $error_string . '</p></div>';
   		} else 	if( isset( $data['headers']['content-length'] ) ) {
			$raw = $data['headers']['content-length'];
			$formatted = $this->format_bytes( $raw );
			$size = array(
				'raw' => $raw,
				'formatted' => $formatted
			);
			return $size;
		}
	}
	return false;
}