WordPress at Your Fingertips
function is not described

SimplePie_Net_IPv6::split_v6_v4() private WP 1.0

Splits an IPv6 address into the IPv6 and IPv4 representation parts

RFC 4291 allows you to represent the last two parts of an IPv6 address using the standard IPv4 representation

Example: 0:0:0:0:0:0:13.1.68.3
0:0:0:0:0:FFFF:129.144.52.38

{} It's a method of the class: SimplePie_Net_IPv6{}

No Hooks.

Return

Array. [0] contains the IPv6 represented part, and [1] the IPv4 represented part

Usage

$result = SimplePie_Net_IPv6::split_v6_v4( $ip );
$ip(string) (required)
An IPv6 address

Code of SimplePie_Net_IPv6::split_v6_v4() WP 5.8.2

private static function split_v6_v4($ip)
{
	if (strpos($ip, '.') !== false)
	{
		$pos = strrpos($ip, ':');
		$ipv6_part = substr($ip, 0, $pos);
		$ipv4_part = substr($ip, $pos + 1);
		return array($ipv6_part, $ipv4_part);
	}

	return array($ip, '');
}