PHP 如何获取当前电脑的 mac 地址? [ 2.0 版本 ]

class MacUtil
{
    var $result = array();
    var $macAddrs = array(); //所有mac地址
    var $macAddr;            //第一个mac地址

    public function __construct($OS = PHP_OS)
    {
        $this->GetMac($OS);
    }

    public function GetMac($OS)
    {
        switch (strtolower($OS)) {
            case "unix":
                break;
            case "solaris":
                break;
            case "aix":
                break;
            case "linux":
                $this->getLinux();
                break;
            default:
                $this->getWindows();
                break;
        }
        $tem = array();
        foreach ($this->result as $val) {
            if (preg_match("/[0-9a-f][0-9a-f][:-]" . "[0-9a-f][0-9a-f][:-]" . "[0-9a-f][0-9a-f][:-]" . "[0-9a-f][0-9a-f][:-]" . "[0-9a-f][0-9a-f][:-]" . "[0-9a-f][0-9a-f]/i", $val, $tem)) {
                $this->macAddr = $tem[0];//多个网卡时，会返回第一个网卡的mac地址，一般够用。
                break;
                //$this->macAddrs[] = $temp_array[0];//返回所有的mac地址
            }
        }
        unset($temp_array);
        return $this->macAddr;
    }

    //Linux系统
    public function getLinux()
    {
        @exec("ifconfig -a", $this->result);
        return $this->result;
    }

    //Windows系统
    public function getWindows()
    {
        @exec("ipconfig /all", $this->result);
        if ($this->result) {
            return $this->result;
        } else {
            $ipconfig = $_SERVER["WINDIR"] . "\system32\ipconfig.exe";
            if (is_file($ipconfig)) {
                @exec($ipconfig . " /all", $this->result);
            } else {
                @exec($_SERVER["WINDIR"] . "\system\ipconfig.exe /all", $this->result);
                return $this->result;
            }
        }
    }

    /**
     * mac合法性校验 兼容大小写和(:-)
     * @param $mac
     * @return bool
     */
    public function mac_check($mac)
    {
        if (empty($mac)) {
            return FALSE;
        }

        $mac_reg = '/^([0-9a-fA-F]{2})((([:][0-9a-fA-F]{2}){5})|(([-][0-9a-fA-F]{2}){5}))$/i';
        return preg_match($mac_reg, $mac) == 1 ? TRUE : FALSE;
    }

    /**
     * mac 转化为数字表示
     * @param $mac_str
     * @return bool|number
     */
    public function macToInt($mac_str)
    {
        if (!$this->mac_check($mac_str)) return FALSE;

        $filter_mac = strtolower(preg_replace('/[:-]/', '', $mac_str));
        $mac_int = hexdec($filter_mac);
        if (is_numeric($mac_int))
            return $mac_int;
        else
            return FALSE;
    }

    /**
     * 数字转换为标准mac
     * @param $mac_int
     * @param string $chain ('-', ':')
     * @return bool|string
     */
    public function intToMac($mac_int, $chain = '-')
    {
        $max_value = 281474976710655;
        $min_value = 0;
        if (!is_numeric($mac_int) || $mac_int > $max_value || $mac_int < $min_value) return FALSE;

        $chain_list = array('-', ':');
        if (!in_array($chain, $chain_list)) return FALSE;

        $mac_hex = dechex($mac_int);
        $mac_str = strval($mac_hex);
        $mac_hex_len = strlen($mac_hex);
        if ($mac_hex_len < 12) {
            $add_len = 12 - $mac_hex_len;
            $add_str = '';
            while ($add_len--) {
                $add_str .= '0';
            }
            $mac_str = $add_str . $mac_str;
        }
        $mac_arr = str_split($mac_str, 2);
        $mac_full_str = implode($chain, $mac_arr);


        if (!$this->mac_check($mac_full_str)) {
            return FALSE;
        } else {
            $res = str_replace("-", ":", strtoupper($mac_full_str));
            return $res;
        }
    }
}