    eio_seek (PECL eio >= 0.5.0b)
eio_seek — Repositions the offset of the open file associated with the fd argument to the argument offset according to the directive whence   Description eio_seek(
 mixed $fd,
 int $offset,
 int $whence,
 int $pri = EIO_PRI_DEFAULT,
 callable $callback = NULL,
 mixed $data = NULL
): resource  eio_seek() repositions the offset of the open file associated with stream, Socket resource, or file descriptor specified by fd to the argument offset according to the directive whence as follows: 
 
EIO_SEEK_SET - Set position equal to offset bytes. 
EIO_SEEK_CUR - Set position to current location plus offset. 
EIO_SEEK_END - Set position to end-of-file plus offset.    Parameters   fd
   Stream, Socket resource, or numeric file descriptor    offset
   Starting point from which data is to be read.    length
   Number of bytes to be read.    pri
  The request priority: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or null. If null passed, pri internally is set to EIO_PRI_DEFAULT.    callback
   callback function is called when the request is done. It should match the following prototype: 
void callback(mixed $data, int $result[, resource $req]);   data
  is custom data passed to the request.
  result
  request-specific result value; basically, the value returned by corresponding system call.
  req
  is optional request resource which can be used with functions like eio_get_last_error()
    data
   Arbitrary variable passed to callback.      Return Values  eio_seek() returns request resource on success, or false on failure.   


    
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