(PECL eio >= 0.0.1dev)
eio_dup2 — Duplicate a file descriptor
$fd
, int $fd2
[, int $pri = EIO_PRI_DEFAULT
[, callable $callback = NULL
[, mixed $data = NULL
]]] )eio_dup2() duplicates file descriptor.
fd
Source file descriptor
fd2
Target file descriptor
pri
The request priority: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or NULL.
If NULL passed, pri internally is set to
EIO_PRI_DEFAULT.
callback
callback function is called when the request is done.
It should match the following prototype:
void callback($data, $result);
$data is custom
data passed to the request.
$result contains
request-specific result value; basically, the value returned by corresponding
system call.
data
Arbitrary variable passed to callback.
eio_dup2() returns request resource on success or FALSE on error.