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;        ?>