eio_ftruncate
Truncate a file
Description
resource eio_ftruncate
( mixed $fd
[, int $offset = 0
[, int $pri = EIO_PRI_DEFAULT
[, callable $callback = NULL
[, mixed $data = NULL
]]]] )
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 error.