eio_truncate

(PECL eio >= 0.0.1dev)

eio_truncate — Truncate a file

Beschreibung

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

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

Parameter-Liste

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.

Rückgabewerte

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

Siehe auch