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# socket_getpeername

(PHP 4 >= 4.1.0, PHP 5)

socket_getpeername -- Queries the remote side of the given socket which may either result in host/port or in a Unix filesystem path, dependent on its type

## Description

bool socket_getpeername ( resource socket, string &addr [, int &port] )

If the given socket is of type `AF_INET` or `AF_INET6`, socket_getpeername() will return the peers (remote) IP address in appropriate notation (e.g. 127.0.0.1 or fe80::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.

> 注: socket_getpeername() should not be used with `AF_UNIX` sockets created with socket_accept(). Only sockets created with socket_connect() or a primary server socket following a call to socket_bind() will return meaningful values.

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`, `AF_INET6`, or `AF_UNIX`, in which case the last socket error code is not updated.

See also socket_getsockname(), socket_last_error() and socket_strerror().

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