eio_ftruncate

PECL eio >= 0.0.1dev
eio_ftruncate - Truncate a file
Manual

eio_ftruncate(
     mixed$fd,
     [int$offset = 0],
     [int$pri = EIO_PRI_DEFAULT],
     [callable$callback = NULL],
     [mixed$data = NULL]
): resource

eio_ftruncate causes a regular file referenced by fd file descriptor to be truncated to precisely length bytes.

Parameters

fd

Stream, Socket resource, or numeric file descriptor.

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.

Return Values

eio_ftruncate returns request resource on success, or false on failure.

Related Functions

Function eio_ftruncate:

  • Manual

Eio Functions

Most used PHP functions