(PECL eio >= 0.0.1dev)
Truncate a file
resource eio_ftruncate ( mixed $fd [, int $offset = 0 [, int $pri = EIO_PRI_DEFAULT [, callable $callback = NULL [, mixed $data = NULL ]]]] )
eio_ftruncate() causes a regular file referenced by fd file descriptor to be truncated to precisely length bytes.
Parameters:
fd
Stream, Socket resource, or numeric file descriptor.