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PHP5中文手册
dio_truncate(PHP 4 >= 4.2.0, PHP 5 <= 5.0.5) dio_truncate — Truncates file descriptor fd to offset bytes 说明
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.
返回值如果成功则返回 TRUE,失败则返回 FALSE。 |