PHP获取网卡MAC地址的代码

使用下面的代码可以获取网卡的MAC地址

 <?php  

 /**  

                 获取机器网卡的物理（MAC）地址    

 **/ 

 class   GetMacAddr  

{  

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

                 var   $mac_addr;  

                   

               function   GetMacAddr($os_type)  

                {  

                                switch   (   strtolower($os_type)   )  

                                 {  

                                                 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]; 

                                                                break;  

                                                }  

                                }  

                               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 "]. "\system32\ipconfig.exe ";  

                                               if   (   is_file($ipconfig)   )  

                                                                 @exec($ipconfig. "   /all ",   $this-> return_array);  

                                                 else 

                                                                 @exec($_SERVER[ "WINDIR "]. "\system\ipconfig.exe   /all ",   $this-> return_array);  

                                                 return   $this-> return_array;  

                                 }  

                }  

   

                 function   forLinux()  

                {  

                               @exec( "ifconfig   -a ",   $this-> return_array);  

                                return   $this-> return_array;  

                 }  

 }  

?>  

<?  

 $mac   =   new   GetMacAddr(PHP_OS);  

 echo   $mac-> mac_addr;  
?>