Merge branch '3.3.x'

phpBB/includes/functions.php

@@ -3141,172 +3141,6 @@ function phpbb_inet_pton($address)
 	return false;
 }
 
-/**
-* Wrapper for php's checkdnsrr function.
-*
-* @param string $host	Fully-Qualified Domain Name
-* @param string $type	Resource record type to lookup
-*						Supported types are: MX (default), A, AAAA, NS, TXT, CNAME
-*						Other types may work or may not work
-*
-* @return mixed		true if entry found,
-*					false if entry not found,
-*					null if this function is not supported by this environment
-*
-* Since null can also be returned, you probably want to compare the result
-* with === true or === false,
-*/
-function phpbb_checkdnsrr($host, $type = 'MX')
-{
-	// The dot indicates to search the DNS root (helps those having DNS prefixes on the same domain)
-	if (substr($host, -1) == '.')
-	{
-		$host_fqdn = $host;
-		$host = substr($host, 0, -1);
-	}
-	else
-	{
-		$host_fqdn = $host . '.';
-	}
-	// $host		has format	some.host.example.com
-	// $host_fqdn	has format	some.host.example.com.
-
-	// If we're looking for an A record we can use gethostbyname()
-	if ($type == 'A' && function_exists('gethostbyname'))
-	{
-		return (@gethostbyname($host_fqdn) == $host_fqdn) ? false : true;
-	}
-
-	if (function_exists('checkdnsrr'))
-	{
-		return checkdnsrr($host_fqdn, $type);
-	}
-
-	if (function_exists('dns_get_record'))
-	{
-		// dns_get_record() expects an integer as second parameter
-		// We have to convert the string $type to the corresponding integer constant.
-		$type_constant = 'DNS_' . $type;
-		$type_param = (defined($type_constant)) ? constant($type_constant) : DNS_ANY;
-
-		// dns_get_record() might throw E_WARNING and return false for records that do not exist
-		$resultset = @dns_get_record($host_fqdn, $type_param);
-
-		if (empty($resultset) || !is_array($resultset))
-		{
-			return false;
-		}
-		else if ($type_param == DNS_ANY)
-		{
-			// $resultset is a non-empty array
-			return true;
-		}
-
-		foreach ($resultset as $result)
-		{
-			if (
-				isset($result['host']) && $result['host'] == $host &&
-				isset($result['type']) && $result['type'] == $type
-			)
-			{
-				return true;
-			}
-		}
-
-		return false;
-	}
-
-	// If we're on Windows we can still try to call nslookup via exec() as a last resort
-	if (DIRECTORY_SEPARATOR == '\\' && function_exists('exec'))
-	{
-		@exec('nslookup -type=' . escapeshellarg($type) . ' ' . escapeshellarg($host_fqdn), $output);
-
-		// If output is empty, the nslookup failed
-		if (empty($output))
-		{
-			return NULL;
-		}
-
-		foreach ($output as $line)
-		{
-			$line = trim($line);
-
-			if (empty($line))
-			{
-				continue;
-			}
-
-			// Squash tabs and multiple whitespaces to a single whitespace.
-			$line = preg_replace('/\s+/', ' ', $line);
-
-			switch ($type)
-			{
-				case 'MX':
-					if (stripos($line, "$host MX") === 0)
-					{
-						return true;
-					}
-				break;
-
-				case 'NS':
-					if (stripos($line, "$host nameserver") === 0)
-					{
-						return true;
-					}
-				break;
-
-				case 'TXT':
-					if (stripos($line, "$host text") === 0)
-					{
-						return true;
-					}
-				break;
-
-				case 'CNAME':
-					if (stripos($line, "$host canonical name") === 0)
-					{
-						return true;
-					}
-				break;
-
-				default:
-				case 'AAAA':
-					// AAAA records returned by nslookup on Windows XP/2003 have this format.
-					// Later Windows versions use the A record format below for AAAA records.
-					if (stripos($line, "$host AAAA IPv6 address") === 0)
-					{
-						return true;
-					}
-				// No break
-
-				case 'A':
-					if (!empty($host_matches))
-					{
-						// Second line
-						if (stripos($line, "Address: ") === 0)
-						{
-							return true;
-						}
-						else
-						{
-							$host_matches = false;
-						}
-					}
-					else if (stripos($line, "Name: $host") === 0)
-					{
-						// First line
-						$host_matches = true;
-					}
-				break;
-			}
-		}
-
-		return false;
-	}
-
-	return NULL;
-}
-
 // Handler, header and footer
 
 /**