(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
socket_set_option — Sets socket options for the socket
$socket
, int $level
, int $option
, array|string|int $value
) : bool
The socket_set_option() function sets the option
specified by the option parameter, at the
specified protocol level, to the value pointed to
by the value parameter for the
socket.
socketA Socket instance created with socket_create() or socket_accept().
level
The level parameter specifies the protocol
level at which the option resides. For example, to retrieve options at
the socket level, a level parameter of
SOL_SOCKET would be used. Other levels, such as
TCP, can be used by specifying the protocol number of that level.
Protocol numbers can be found by using the
getprotobyname() function.
optionThe available socket options are the same as those for the socket_get_option() function.
valueThe option value.
成功时返回 true， 或者在失败时返回 false。
| 版本 | 说明 |
|---|---|
| 8.0.0 |
socket is a Socket instance now;
previously, it was a resource.
|
示例 #1 socket_set_option() example
<?php
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if (!is_resource($socket)) {
echo 'Unable to create socket: '. socket_strerror(socket_last_error()) . PHP_EOL;
}
if (!socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1)) {
echo 'Unable to set option on socket: '. socket_strerror(socket_last_error()) . PHP_EOL;
}
if (!socket_bind($socket, '127.0.0.1', 1223)) {
echo 'Unable to bind socket: '. socket_strerror(socket_last_error()) . PHP_EOL;
}
$rval = socket_get_option($socket, SOL_SOCKET, SO_REUSEADDR);
if ($rval === false) {
echo 'Unable to get socket option: '. socket_strerror(socket_last_error()) . PHP_EOL;
} else if ($rval !== 0) {
echo 'SO_REUSEADDR is set on socket !' . PHP_EOL;
}
?>