(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
��������ȼ���EIO_PRI_DEFAULT
��EIO_PRI_MIN
��EIO_PRI_MAX
�� NULL
�������
NULL
��pri
����Ϊ
EIO_PRI_DEFAULT
��
callback
callback
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void callback(mixed $data, int $result[, resource $req]);
data
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result
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req
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data
Arbitrary variable passed to callback
.
eio_dup2() returns request resource on success or FALSE
on error.