php获得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; 

?>