eio_truncate

(PECL eio >= 0.0.1dev)

eio_truncate — Truncate a file

Descrizione

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

Elenco dei parametri

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.

Valori restituiti

eio_busy() returns request resource on success, o false in caso di fallimento.

Vedere anche:

eio_ftruncate() - Truncate a file

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