php获取网卡的MAC地址

/**

• 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 $mac_addr;
  public function GetMacAddr($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;
  }

public 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;
}
}

public 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;