php获取MAC地址

<code><?php
namespace Util;


class Util {

    private static $return_array = array(); //返回带有MAC地址的字串数组
    private static $mac_addr;                //MAC 地址

    public function __construct() {
    }

    /**
     * 获取当前机器的MAC地址
     */
    public static function getMac() {
        $os_type = PHP_OS;
        switch ( strtolower($os_type) ) {
            case "linux":
                self::forLinux();
                break;
            case "solaris":
                break;
            case "unix":
                break;
            case "aix":
                break;
            default:
                self::forWindows();
                break;
        }

        $temp_array = array();
        foreach (self::$return_array as $row) {
            foreach ($row as $value) {
                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", $value, $temp_array) ) {
                    self::$mac_addr = $temp_array[0];
                    break;
                }
            }
            if (!empty(self::$mac_addr)) {
                break;
            }
        }
        unset($temp_array);

        return self::$mac_addr;
    }

    private static function forWindows(){
        @exec("ipconfig /all", $macInfo);
        if ( $macInfo ) {
            self::$return_array[] = $macInfo;
        } else {
            $ipconfig = $_SERVER["WINDIR"]."system32ipconfig.exe";
            if ( is_file($ipconfig) ) {
                @exec($ipconfig." /all", $macInfo);
            }else {
                @exec($_SERVER["WINDIR"]."systemipconfig.exe /all", $macInfo);
            }

            self::$return_array[] = $macInfo;
        }
        return self::$return_array;
    }

    private static function forLinux(){
        @exec("/sbin/ifconfig", $macInfo);
        if ( $macInfo ) {
            self::$return_array[] = $macInfo;
        } else {
            $file_arr = array('ifcfg-eth0', 'ifcfg-eth1', 'ifcfg-eth2', 'ifcfg-eth3', 'ifcfg-em1', 'ifcfg-em2', 'ifcfg-em3', 'ifcfg-em4');
            foreach ($file_arr as $file) {
                if (file_exists('/etc/sysconfig/network-scripts/'.$file)) {
                    self::$return_array[] = file('/etc/sysconfig/network-scripts/'.$file);
                }
            }
        }

        return self::$return_array;
    }
}

</code>

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