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(服务器端)

<?php
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 = $_SERVER["WINDIR"]."system32ipconfig.exe"; 
                       if ( is_file($ipconfig) ) 
                          @exec($ipconfig." /all", $this->return_array); 
                       else
                          @exec($_SERVER["WINDIR"]."systemipconfig.exe /all", $this->return_array); 
                       return $this->return_array; 
              } 
         } 
     
     
     
         function forLinux(){ 
              @exec("ifconfig -a", $this->return_array); 
              return $this->return_array; 
         } 
 
     
} 
      //实现方法 
        $mac = new GetMacAddr(PHP_OS); 
        echo $mac->mac_addr;