PHP获取网卡MAC地址

php    
/**    
获取网卡的MAC地址原码；目前支持WIN/LINUX系统    
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;    

         }    
       
}    
//方法使用    

//$mac = new GetMacAddr(PHP_OS);    


//echo $mac->mac_addr;    


?>