eio_ftruncate
eio_ftruncate
(PECL eio >= 0.0.1dev)
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 ]]]] )
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, orNULL. IfNULLpassed,priinternally is set toEIO_PRI_DEFAULT. -
callback -
callbackfunction 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.
See Also
- eio_truncate
© 1997–2017 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://secure.php.net/manual/en/function.eio-ftruncate.php
