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<?php |
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// @codingStandardsIgnoreFile |
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/** |
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* IP utilities. |
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* |
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* Copyright: © 2009-2011 |
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* {@link http://websharks-inc.com/ WebSharks, Inc.} |
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* (coded in the USA) |
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* |
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* Released under the terms of the GNU General Public License. |
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* You should have received a copy of the GNU General Public License, |
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* along with this software. In the main directory, see: /licensing/ |
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* If not, see: {@link http://www.gnu.org/licenses/}. |
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* |
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* @since 161110 |
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*/ |
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if (!class_exists('c_ws_plugin__s2member_utils_ip')) { |
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/** |
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* IP utilities. |
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* |
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* @since 161110 |
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*/ |
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class c_ws_plugin__s2member_utils_ip |
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{ |
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/** |
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* Get the current visitor's real IP address. |
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* |
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* @since 161110 IP utilities. |
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* |
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* @return string Real IP address, else `unknown` on failure. |
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* |
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* @note This supports both IPv4 and IPv6 addresses. |
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* @note See my tests against this here: http://3v4l.org/fVWUp |
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*/ |
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public static function current() |
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{ |
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static $ip; // Static cache. |
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|
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if ($ip !== null) { |
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return $ip; |
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} |
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$sources = array( |
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'HTTP_CF_CONNECTING_IP', |
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'HTTP_CLIENT_IP', |
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'HTTP_X_FORWARDED_FOR', |
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'HTTP_X_FORWARDED', |
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'HTTP_X_CLUSTER_CLIENT_IP', |
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'HTTP_FORWARDED_FOR', |
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'HTTP_FORWARDED', |
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'HTTP_VIA', |
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'REMOTE_ADDR', |
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); |
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$sources = apply_filters('ws_plugin__s2member_current_ip_sources', $sources); |
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$prioritize_remote_addr = apply_filters('ws_plugin__s2member_current_ip_prioritize_remote_addr', false); |
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|
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if (!empty($_SERVER['REMOTE_ADDR']) && $prioritize_remote_addr) { |
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if (($_valid_public_ip = self::valid_public((string) $_SERVER['REMOTE_ADDR']))) { |
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return $ip = $_valid_public_ip; |
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} // unset($_valid_public_ip); // Housekeeping. |
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} |
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foreach ($sources as $_key => $_source) { |
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if (!empty($_SERVER[$_source])) { // Exists? |
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if (($_valid_public_ip = self::valid_public((string) $_SERVER[$_source]))) { |
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return $ip = $_valid_public_ip; |
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} |
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} // unset($_key, $_source, $_valid_public_ip); // Housekeeping. |
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} |
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if (!empty($_SERVER['REMOTE_ADDR'])) { |
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return $ip = strtolower((string) $_SERVER['REMOTE_ADDR']); |
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} |
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return $ip = 'unknown'; // Not possible. |
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} |
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|
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/** |
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* Gets a valid/public IP address. |
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* |
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* @since 161110 IP utilities. |
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* |
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* @param string $list_of_possible_ips A single IP, or a comma-delimited list of IPs. |
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* |
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* @return string A valid/public IP address (if one is found), else an empty string. |
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* |
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* @note This supports both IPv4 and IPv6 addresses. |
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* @note See my tests against this here: http://3v4l.org/fVWUp |
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*/ |
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public static function valid_public($list_of_possible_ips) |
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{ |
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if (!$list_of_possible_ips || !is_string($list_of_possible_ips)) { |
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return ''; // Empty or invalid data. |
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} elseif (!($list_of_possible_ips = trim($list_of_possible_ips))) { |
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return ''; // Not possible; i.e., empty string. |
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} |
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foreach (preg_split('/[\s;,]+/', $list_of_possible_ips, -1, PREG_SPLIT_NO_EMPTY) as $_key => $_possible_ip) { |
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if (($_valid_public_ip = filter_var(strtolower($_possible_ip), FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE))) { |
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return $_valid_public_ip; // A valid public IPv4 or IPv6 address. |
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} |
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} // unset($_key, $_possible_ip, $_valid_public_ip); // Housekeeping. |
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|
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return ''; // Default return value. |
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} |
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} |
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} |
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|
