eio_truncate

(PECL eio >= 0.0.1dev)

eio_truncate — Truncate a file

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

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.

eio_busy() returns request resource on success, or false on failure.

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