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socket_set_option() with IPV6_PKTINFO
if (!extension_loaded('sockets')) {
die('skip sockets extension not available.');
if (!defined('IPPROTO_IPV6')) {
die('skip IPv6 not available.');
if (substr(PHP_OS, 0, 3) == 'WIN')
die('skip Not for Windows!');
$s = socket_create(AF_INET6, SOCK_DGRAM, SOL_UDP) or die("err");
var_dump(socket_set_option($s, IPPROTO_IPV6, IPV6_PKTINFO, []));
var_dump(socket_set_option($s, IPPROTO_IPV6, IPV6_PKTINFO, [
"addr" => '::1',
"ifindex" => 0
//Oddly, Linux does not support IPV6_PKTINFO in sockgetopt().
//See do_ipv6_getsockopt() on the kernel sources
//A work-around with is sort-of possible (with IPV6_2292PKTOPTIONS),
//but not worth it
//var_dump(socket_get_option($s, IPPROTO_IPV6, IPV6_PKTINFO));
Warning: socket_set_option(): error converting user data (path: in6_pktinfo): The key 'addr' is required in %s on line %d
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