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<?php |
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|
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namespace Dudlewebs\WPMCS\s3\Aws\Credentials; |
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|
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final class CredentialsUtils |
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{ |
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/** |
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* Determines whether a given host |
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* is a loopback address. |
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* |
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* @param $host |
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* |
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* @return bool |
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*/ |
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public static function isLoopBackAddress($host) : bool |
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{ |
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if (!\filter_var($host, \FILTER_VALIDATE_IP)) { |
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return \false; |
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} |
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if (\filter_var($host, \FILTER_VALIDATE_IP, \FILTER_FLAG_IPV6)) { |
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if ($host === '::1') { |
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return \true; |
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} |
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return \false; |
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} |
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$loopbackStart = \ip2long('127.0.0.0'); |
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$loopbackEnd = \ip2long('127.255.255.255'); |
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$ipLong = \ip2long($host); |
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return $ipLong >= $loopbackStart && $ipLong <= $loopbackEnd; |
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} |
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} |
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