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
)

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, 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 failure.