eio_dup2
(PECL eio >= 0.0.1dev)
eio_dup2 — Duplicate a file descriptor
Description
mixed
$fd
,mixed
$fd2
,int
$pri
= EIO_PRI_DEFAULT,callable
$callback
= NULL,mixed
$data
= NULL): resource
eio_dup2() duplicates file descriptor.
Parameters
-
fd
-
Source stream, Socket resource, or numeric file descriptor
-
fd2
-
Target stream, Socket resource, or numeric file descriptor
-
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
.
Return Values
eio_dup2() returns request resource on success, or false
on failure.