Php/docs/function.eio-truncate
eio_truncate
(PECL eio >= 0.0.1dev)
eio_truncate — Truncate a file
Description
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
Parameters
path
File path
offset
Offset from beginning of the file.
pri
The request priority:
EIO_PRI_DEFAULT
,EIO_PRI_MIN
,EIO_PRI_MAX
, orNULL
. IfNULL
passed,pri
internally is set toEIO_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
.