dio_truncate
(PHP 4 >= 4.2.0, PHP 5 <= 5.0.5)
dio_truncate — Truncates file descriptor fd to offset bytes
說明
bool dio_truncate
( resource $fd
, int $offset
)
dio_truncate() truncates a file to at most offset bytes in size.
If the file previously was larger than this size, the extra data is lost. If the file previously was shorter, it is unspecified whether the file is left unchanged or is extended. In the latter case the extended part reads as zero bytes.
Note: 本函式未在 Windows 平台下實作。
Return值
如果成功則回傳 TRUE，失敗則回傳 FALSE。