(PECL eio >= 0.0.1dev)
eio_dup2 — Duplicate a file descriptor
eio_dup2() duplicates file descriptor.
Source file descriptor
Target file descriptor
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 function is called when the request is done. It should match the following prototype:$data is custom data passed to the request. $result contains request-specific result value; basically, the value returned by corresponding system call.
void callback($data, $result);
Arbitrary variable passed to callback.
eio_dup2() returns request resource on success or FALSE on error.