socket_getpeername
(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
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
说明
$socket
, string &$address
, int &$port
= null
) : boolQueries the remote side of the given socket which may either result in host/port or in a Unix filesystem path, dependent on its type.
参数
-
socket
-
A Socket instance created with socket_create() or socket_accept().
-
address
-
If the given socket is of type
AF_INET
orAF_INET6
, socket_getpeername() will return the peers (remote) IP address in appropriate notation (e.g.127.0.0.1
orfe80::1
) in theaddress
parameter and, if the optionalport
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 theaddress
parameter. -
port
-
If given, this will hold the port associated to
address
.
返回值
成功时返回 true
, 或者在失败时返回 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.
更新日志
版本 | 说明 |
---|---|
8.0.0 |
socket is a Socket instance now;
previously, it was a resource.
|
注释
注意:
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.
注意:
For having socket_getpeername() to return a meaningful value, the socket it is applied upon must of course be one for which the concept of "peer" makes sense.
参见
- socket_getsockname() - Queries the local side of the given socket which may either result in host/port or in a Unix filesystem path, dependent on its type
- socket_last_error() - Returns the last error on the socket
- socket_strerror() - Return a string describing a socket error