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Dieses Dokument verwendet PHP-Handbuch für chinesische Websites Freigeben
(PHP 4 >= 4.3.2, PHP 5)
streamWrapper::stream_seek — Seeks to specific location in a stream
$offset
, int $whence
= SEEK_SET
)This method is called in response to fseek() .
The read/write position of the stream should be updated according to the
offset
and whence
.
offset
The stream offset to seek to.
whence
Possible values:
SEEK_SET
- Set position equal to offset
bytes.SEEK_CUR
- Set position to current location plus offset
.SEEK_END
- Set position to end-of-file plus offset
.
Return TRUE
if the position was updated, FALSE
otherwise.
Note:
If not implemented,
FALSE
is assumed as the return value.
Note:
Upon success, streamWrapper::stream_tell() is called directly after calling streamWrapper::stream_seek() . If streamWrapper::stream_tell() fails, the return value to the caller function will be set to
FALSE
Note:
Not all seeks operations on the stream will result in this function being called. PHP streams have read buffering enabled by default (see also stream_set_read_buffer() ) and seeking may be done by merely moving the buffer pointer.
[#1] fb at tigermedia dot dk [2014-05-27 08:55:07]
Please notice that the return value of this function is a boolean but the return value of fseek is 0 for ok and -1 for failure.
Please use this implementation when working with files:
function stream_seek($offset, $whence) {
if(0 === fseek($this->_handler, $offset, $whence)){
return true;
}
return false;
}