php获取本机ip或远道地址

// 111111111111echo $_SERVER['REMOTE_ADDR'];// 2222222222222function get_local_ip() {    $preg = "/\A((([0-9]?[0-9])|(1[0-9]{2})|(2[0-4][0-9])|(25[0-5]))\.){3}(([0-9]?[0-9])|(1[0-9]{2})|(2[0-4][0-9])|(25[0-5]))\Z/";//获取操作系统为win2000/xp、win7的本机IP真实地址    exec("ipconfig", $out, $stats);    if (!empty($out)) {        foreach ($out AS $row) {            if (strstr($row, "IP") && strstr($row, ":") && !strstr($row, "IPv6")) {                $tmpIp = explode(":", $row);                if (preg_match($preg, trim($tmpIp[1]))) {                    return trim($tmpIp[1]);                }            }        }    }//获取操作系统为linux类型的本机IP真实地址    exec("ifconfig", $out, $stats);    if (!empty($out)) {        if (isset($out[1]) && strstr($out[1], 'addr:')) {            $tmpArray = explode(":", $out[1]);            $tmpIp = explode(" ", $tmpArray[1]);            if (preg_match($preg, trim($tmpIp[0]))) {                return trim($tmpIp[0]);            }        }    }    return '127.0.0.1';}