<?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; 
?>