streamWrapper::stream_seek
(PHP 4 >= 4.3.2, PHP 5)
streamWrapper::stream_seek — Seeks to specific location in a stream
설명
public bool streamWrapper::stream_seek
( int $offset
, int $whence = SEEK_SET
)
The read/write position of the stream should be updated according to the
offset and whence.
인수
-
offset
-
The stream offset to seek to.
-
whence
-
Possible values:
SEEK_SET - Set position equal to offset bytes.SEEK_CUR - Set position to current location plus offset.SEEK_END - Set position to end-of-file plus offset.
반환값
Return TRUE if the position was updated, FALSE otherwise.
주의
Note:
If not implemented, FALSE is assumed as the return value.
Note:
Upon success,
streamWrapper::stream_tell() is called directly after
calling streamWrapper::stream_seek(). If
streamWrapper::stream_tell() fails, the return
value to the caller function will be set to FALSE
Note:
Not all seeks operations on the stream will result in this function being
called. PHP streams have read buffering enabled by default (see also
stream_set_read_buffer()) and seeking may be done by
merely moving the buffer pointer.