SimplePie_Net_IPv6::check_ipv6() – Checks an IPv6 address
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Description
Checks an IPv6 address
Checks if the given IP is a valid IPv6 address
Usage
$bool = SimplePie_Net_IPv6::check_ipv6( $ip );
Parameters
- $ip
- ( string ) required – An IPv6 address
Returns
bool true if $ip is a valid IPv6 address
Source
File name: wordpress/wp-includes/SimplePie/Net/IPv6.php
Lines:
1 to 42 of 42
public static function check_ipv6($ip) { $ip = self::uncompress($ip); list($ipv6, $ipv4) = self::split_v6_v4($ip); $ipv6 = explode(':', $ipv6); $ipv4 = explode('.', $ipv4); if (count($ipv6) === 8 && count($ipv4) === 1 || count($ipv6) === 6 && count($ipv4) === 4) { foreach ($ipv6 as $ipv6_part) { // The section can't be empty if ($ipv6_part === '') return false; // Nor can it be over four characters if (strlen($ipv6_part) > 4) return false; // Remove leading zeros (this is safe because of the above) $ipv6_part = ltrim($ipv6_part, '0'); if ($ipv6_part === '') $ipv6_part = '0'; // Check the value is valid $value = hexdec($ipv6_part); if (dechex($value) !== strtolower($ipv6_part) || $value < 0 || $value > 0xFFFF) return false; } if (count($ipv4) === 4) { foreach ($ipv4 as $ipv4_part) { $value = (int) $ipv4_part; if ((string) $value !== $ipv4_part || $value < 0 || $value > 0xFF) return false; } } return true; } return false; }