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이 문서에서는 PHP 중국어 웹사이트 매뉴얼 풀어 주다
(PHP 4 >= 4.1.0, PHP 5)
socket_create_pair — Creates a pair of indistinguishable sockets and stores them in an array
$domain
, int $type
, int $protocol
, array &$fd
) socket_create_pair() creates two connected and
indistinguishable sockets, and stores them in fd
.
This function is commonly used in IPC (InterProcess Communication).
domain
The domain
parameter specifies the protocol
family to be used by the socket. See socket_create()
for the full list.
type
The type
parameter selects the type of communication
to be used by the socket. See socket_create() for the
full list.
protocol
The protocol
parameter sets the specific
protocol within the specified domain
to be used
when communicating on the returned socket. The proper value can be retrieved by
name by using getprotobyname() . If
the desired protocol is TCP, or UDP the corresponding constants
SOL_TCP
, and SOL_UDP
can also be used.
See socket_create() for the full list of supported protocols.
fd
Reference to an array in which the two socket resources will be inserted.
成功时返回 TRUE
, 或者在失败时返回 FALSE
。
版本 | 说明 |
---|---|
5.3.0 | This function is now re-enabled on Windows platforms. |
4.3.0 | This function was due to a bug made unavailable on Windows platforms. |
Example #1 socket_create_pair() example
<?php
$sockets = array();
$domain = ( strtoupper ( substr ( PHP_OS , 0 , 3 )) == 'WIN' ? AF_INET : AF_UNIX );
if ( socket_create_pair ( $domain , SOCK_STREAM , 0 , $sockets ) === false ) {
echo "socket_create_pair failed. Reason: " . socket_strerror ( socket_last_error ());
}
if ( socket_write ( $sockets [ 0 ], "ABCdef123\n" , strlen ( "ABCdef123\n" )) === false ) {
echo "socket_write() failed. Reason: " . socket_strerror ( socket_last_error ( $sockets [ 0 ]));
}
if (( $data = socket_read ( $sockets [ 1 ], strlen ( "ABCdef123\n" ), PHP_BINARY_READ )) === false ) {
echo "socket_read() failed. Reason: " . socket_strerror ( socket_last_error ( $sockets [ 1 ]));
}
var_dump ( $data );
socket_close ( $sockets [ 0 ]);
socket_close ( $sockets [ 1 ]);
?>
Example #2 socket_create_pair() IPC example
<?php
$ary = array();
$strone = 'Message From Parent.' ;
$strtwo = 'Message From Child.' ;
if ( socket_create_pair ( AF_UNIX , SOCK_STREAM , 0 , $ary ) === false ) {
echo "socket_create_pair() failed. Reason: " . socket_strerror ( socket_last_error ());
}
$pid = pcntl_fork ();
if ( $pid == - 1 ) {
echo 'Could not fork Process.' ;
} elseif ( $pid ) {
socket_close ( $ary [ 0 ]);
if ( socket_write ( $ary [ 1 ], $strone , strlen ( $strone )) === false ) {
echo "socket_write() failed. Reason: " . socket_strerror ( socket_last_error ( $ary [ 1 ]));
}
if ( socket_read ( $ary [ 1 ], strlen ( $strtwo ), PHP_BINARY_READ ) == $strtwo ) {
echo "Recieved $strtwo \n" ;
}
socket_close ( $ary [ 1 ]);
} else {
socket_close ( $ary [ 1 ]);
if ( socket_write ( $ary [ 0 ], $strtwo , strlen ( $strtwo )) === false ) {
echo "socket_write() failed. Reason: " . socket_strerror ( socket_last_error ( $ary [ 0 ]));
}
if ( socket_read ( $ary [ 0 ], strlen ( $strone ), PHP_BINARY_READ ) == $strone ) {
echo "Recieved $strone \n" ;
}
socket_close ( $ary [ 0 ]);
}
?>
[#1] cweiske at php dot net [2009-05-09 13:45:43]
The underlying sockpair() function does only support AF_UNIX at least on BSD and Linux.
[#2] thegreatall at gmail dot com [2007-07-13 11:24:20]
There is a syntax error in one of the code samples provided, it should look like this:
<?php
$sockets = array();
if (socket_create_pair(AF_UNIX, SOCK_STREAM, 0, $sockets) === false) {
echo "socket_create_pair failed. Reason: ".socket_strerror(socket_last_error());
}
if (socket_write($sockets[0], "ABCdef123\n", strlen("ABCdef123\n")) === false) {
echo "socket_write() failed. Reason: ".socket_strerror(socket_last_error($sockets[0]));
}
if (($data = socket_read($sockets[1], strlen("ABCdef123\n"), PHP_BINARY_READ)) === false) {
echo "socket_read() failed. Reason: ".socket_strerror(socket_last_error($sockets[1]));
}
var_dump($data);
socket_close($sockets[0]);
socket_close($sockets[1]);
?>