function get_ip() { $unknown = 'unknown'; if ( isset($_SERVER['HTTP_X_FORWARDED_FOR']) && $_SERVER['HTTP_X_FORWARDED_FOR'] && strcasecmp($_SERVER['HTTP_X_FORWARDED_FOR'], $unknown) ) { $ip = $_SERVER['HTTP_X_FORWARDED_FOR']; } elseif ( isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], $unknown) ) { $ip = $_SERVER['REMOTE_ADDR']; } /* 处理多层代理的情况 或者使用正则方式:$ip = preg_match("/[\d\.]{7,15}/", $ip, $matches) ? $matches[0] : $unknown; */ if (false !== strpos($ip, ',')) $ip = reset(explode(',', $ip)); return $ip; }
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