php 한글 메뉴얼 도움말 검색 사이트 Truncate a file [function.eio-truncate]

설명

resource eio_truncate ( string $path [, int $offset = 0 [, int $pri = EIO_PRI_DEFAULT [, callable $callback = NULL [, mixed $data = NULL ]]]] )

eio_truncate() causes the regular file named by path to be truncated to a size of precisely length bytes

인수

path

File path

offset

Offset from beginning of the file.

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.

반환값

eio_busy() returns request resource on success or FALSE on error.

참고

eio_ftruncate