eio_dup2
Duplicate a file descriptor
Description
resource eio_dup2
( mixed $fd
, mixed $fd2
[, int $pri
= EIO_PRI_DEFAULT
[, callable $callback
= NULL
[, mixed $data
= NULL
]]] )
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
, 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_dup2 returns request resource on success or FALSE
on error.