socket_set_option — Sets socket options for the socket

2018-04-18 21:39:19
linefo
491
最后编辑:linefo 于 2018-04-18 21:40:00

socket_set_option

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

socket_set_optionSets socket options for the socket

说明

bool socket_set_option ( resource $socket , int $level , int $optname , mixed $optval )

The socket_set_option() function sets the option specified by the optname parameter, at the specified protocol level, to the value pointed to by the optval parameter for the socket.

参数

socket

A valid socket resource 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.

optname

The available socket options are the same as those for the socket_get_option() function.

optval

The option value.

返回值

成功时返回 TRUE, 或者在失败时返回 FALSE

范例

Example #1 socket_set_option() example

<?php
$socket 
socket_create(AF_INETSOCK_STREAMSOL_TCP);

if (!
is_resource($socket)) {
    echo 
'Unable to create socket: 'socket_strerror(socket_last_error()) . PHP_EOL;
}

if (!
socket_set_option($socketSOL_SOCKETSO_REUSEADDR1)) {
    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;
}

$rval socket_get_option($socketSOL_SOCKETSO_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;
}
?>

参见