php获取网卡MAC地址类

<?php
class GetMacAddr
{
        var $return_array = array(); // 返回带有MAC地址的字串数组
        var $mac_addr=array();
        
        function GetMacAddr()
        {
             switch (strtolower(PHP_OS) )
                {
                        case "linux":$this->forLinux();break;
                        case "solaris":break;
                        case "unix":break;
                        case "aix":break;
                        default:$this->forWindows();break;
                }
    
                
                $temp_array = array();
                foreach ( $this->return_array 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 ) )
                        {
                                $this->mac_addr[] = $temp_array[0];
                        }
                }
                unset($temp_array);
                return $this->mac_addr;
        }

        function forWindows()
        {
                @exec("ipconfig /all", $this->return_array);
                if ( $this->return_array )
                        return $this->return_array;
                else{
                        $ipconfig = $_SERVER["WINDIR"]."system32ipconfig.exe";
                        if ( is_file($ipconfig) )
                           @exec($ipconfig." /all", $this->return_array);
                        else
                           @exec($_SERVER["WINDIR"]."systemipconfig.exe /all", $this->return_array);
                        return $this->return_array;
                }
        }

        function forLinux()
        {
                @exec("ifconfig -a", $this->return_array);
                return $this->return_array;
        }
}

$mac = new GetMacAddr();
echo "<pre>";
print_r( $mac->mac_addr);
?>