1. <?
   
2. //php获取ip的算法
   
3. if(getenv('HTTP_CLIENT_IP')) {
   
4. $onlineip = getenv('HTTP_CLIENT_IP');
   
5. } elseif(getenv('HTTP_X_FORWARDED_FOR')) {
   
6. $onlineip = getenv('HTTP_X_FORWARDED_FOR');
   
7. } elseif(getenv('REMOTE_ADDR')) {
   
8. $onlineip = getenv('REMOTE_ADDR');
   
9. } else {
   
10. $onlineip = $HTTP_SERVER_VARS['REMOTE_ADDR'];
    
11. }
    
12. exec ("ping $onlineip");
    
13. $macaddress=exec ("arp -a | find /i".' "'.$onlineip.'"');
    
14. $computername=exec ('nbtstat -A'.' '.$onlineip.' | find /i "20"');
    
15. $MacName=(preg_split("/\s+/", trim($macaddress)));
    
16. $UserName=(preg_split("/\s+/", trim($computername)));
    
17. echo "计算机名：".$UserName[0]." --- "."IP 地址：".$MacName[0]." --- "."MAC 地址：".$MacName[1];
    
18. ?>
    
19. 
    
20. class GetMacAddr
    
21. {
    
22. var $return_array = array(); // 返回带有MAC地址的字串数组
    
23. var $mac_addr=array();
    
24. 
    
25. function GetMacAddr()
    
26. {
    
27. switch (strtolower(PHP_OS) )
    
28. {
    
29. case "linux":$this->forLinux();break;
    
30. case "solaris":break;
    
31. case "unix":break;
    
32. case "aix":break;
    
33. default:$this->forWindows();break;
    
34. }
    
35. 
    
36. 
    
37. $temp_array = array();
    
38. foreach ( $this->return_array as $value )
    
39. {
    
40. 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 ) )
    
41. {
    
42. $this->mac_addr[] = $temp_array[0];
    
43. }
    
44. }
    
45. unset($temp_array);
    
46. return $this->mac_addr;
    
47. }
    
48. 
    
49. function forWindows()
    
50. {
    
51. @exec("ipconfig /all", $this->return_array);
    
52. if ( $this->return_array )
    
53. return $this->return_array;
    
54. else{
    
55. $ipconfig = $_SERVER["WINDIR"]."\system32\ipconfig.exe";
    
56. if ( is_file($ipconfig) )
    
57. @exec($ipconfig." /all", $this->return_array);
    
58. else
    
59. @exec($_SERVER["WINDIR"]."\system\ipconfig.exe /all", $this->return_array);
    
60. return $this->return_array;
    
61. }
    
62. }
    
63. 
    
64. function forLinux()
    
65. {
    
66. @exec("ifconfig -a", $this->return_array);
    
67. return $this->return_array;
    
68. }
    
69. }
    
70. 
    
71. $mac = new GetMacAddr();
    
72. echo "<pre>";
    
73. print_r( $mac->mac_addr);
    

?>

获取客户端MAC(经过测试 无效 除非在同一个网关内)

2. function GetClientMac() {
   
3. $return_array = array();
   
4. $temp_array = array();
   
5. $mac_addr = "";
   
6. @exec("arp -a",$return_array);
   
7. foreach($return_array as $value) {
   
8. if(strPos($value,$_SERVER["REMOTE_ADDR"]) !== false && preg_match("/(:?[0-9a-f]{2}[:-]){5}[0-9a-f]{2}/i",$value,$temp_array)) {
   
9. $mac_addr = $temp_array[0];
   
10. break;
    
11. }
    
12. }
    
13. return ($mac_addr); 

原文引用：http://blog.sina.com.cn/s/blog_6f78e9030100wxwr.html