(PHP 4 = 4.1.0)
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If the given socket is of type
AF_INET,
socket_getpeername() will return the peers (remote) IP address in
dotted-quad notation (e.g.
127.0.0.1) in the
address parameter and, if the optional port parameter is present, also the
associated port.
If the given socket is of type
AF_UNIX,
socket_getpeername() will return the UNIX filesystem path
(e.g. /var/run/daemon.sock) in the
address parameter.
成功回傳TRUE失敗回傳FALSE。
socket_getpeername() may also return FALSE if the socket type is not any of
AF_INET or AF_UNIX, in which case the last socket
error code is
not updated.
See also socket_getpeername(),
socket_last_error() and
socket_strerror().