(PECL eio >= 0.0.1dev)
Read from a file descriptor at given offset.
resource eio_read ( mixed $fd, int $length, int $offset, int $pri, callable $callback [, mixed $data = NULL ] )
eio_read() reads up to length bytes from fd file descriptor at offset. The read bytes are stored in result argument of callback.
Parameters:
fd
Stream, Socket resource, or numeric file descr