finfo {
   public __construct([ int options = FILEINFO_NONE [, stringmagic_file = "" ]] )
   public buffer( string string [, intoptions = FILEINFO_NONE [, resource context ]] ) : string
   public file( stringfile_name [, int options = FILEINFO_NONE [, resourcecontext ]] ) : string
   public set_flags( int $options ) : bool
}