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<?php
if (!defined("AF_INET6")) {
die('skip no IPv6 support');
}
/* If IPv6 is supported on the platform this will error out with code 111 - Connection refused.
If IPv6 is NOT supported, $errno will be set to something else (indicating parse/getaddrinfo error) */
@stream_socket_client('tcp://[::1]:0', $errno);
if ($errno != 111) die('skip no IPv6 support');
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