(PECL eio >= 0.0.1dev)
eio_dup2 — Duplicate a file descriptor
$fd
, mixed $fd2
, int $pri
= EIO_PRI_DEFAULT
, callable $callback
= NULL
, mixed $data
= NULL
) : resourceeio_dup2() duplicates file descriptor.
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
.
eio_dup2() returns request resource on success,Im Fehlerfall wird false
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