php防止刷流量攻击

1. <?php
   
2. //查询禁止IP
   
3. $ip =$_SERVER['REMOTE_ADDR'];
   
4. $fileht=".htaccess2";
   
5. if(!file_exists($fileht))file_put_contents($fileht,"");
   
6. $filehtarr=@file($fileht);
   
7. if(in_array($ip."\r\n",$filehtarr))die("Warning:"."<br>"."Your IP address are forbided by some reason, IF you have any question Pls emill to shop@mydalle.com!");
   
8. //加入禁止IP
   
9. $time=time();
   
10. $fileforbid="log/forbidchk.dat";
    
11. if(file_exists($fileforbid))
    
12. { if($time-filemtime($fileforbid)>60)unlink($fileforbid);
    
13. else{
    
14. $fileforbidarr=@file($fileforbid);
    
15. if($ip==substr($fileforbidarr[0],0,strlen($ip)))
    
16. {
    
17. if($time-substr($fileforbidarr[1],0,strlen($time))>600)unlink($fileforbid);
    
18. elseif($fileforbidarr[2]>600){file_put_contents($fileht,$ip."\r\n",FILE_APPEND);unlink($fileforbid);}
    
19. else{$fileforbidarr[2]++;file_put_contents($fileforbid,$fileforbidarr);}
    
20. }
    
21. }
    
22. }
    
23. //防刷新
    
24. $str="";
    
25. $file="log/ipdate.dat";
    
26. if(!file_exists("log")&&!is_dir("log"))mkdir("log",0777);
    
27. if(!file_exists($file))file_put_contents($file,"");
    
28. $allowTime = 120;//防刷新时间
    
29. $allowNum=10;//防刷新次数
    
30. $uri=$_SERVER['REQUEST_URI'];
    
31. $checkip=md5($ip);
    
32. $checkuri=md5($uri);
    
33. $yesno=true;
    
34. $ipdate=@file($file);
    
35. foreach($ipdate as $k=>$v)
    
36. { $iptem=substr($v,0,32);
    
37. $uritem=substr($v,32,32);
    
38. $timetem=substr($v,64,10);
    
39. $numtem=substr($v,74);
    
40. if($time-$timetem<$allowTime){
    
41. if($iptem!=$checkip)$str.=$v;
    
42. else{
    
43. $yesno=false;
    
44. if($uritem!=$checkuri)$str.=$iptem.$checkuri.$time."1\r\n";
    
45. elseif($numtem<$allowNum)$str.=$iptem.$uritem.$timetem.($numtem+1)."\r\n";
    
46. else
    
47. {
    
48. if(!file_exists($fileforbid)){$addforbidarr=array($ip."\r\n",time()."\r\n",1);file_put_contents($fileforbid,$addforbidarr);}
    
49. file_put_contents("log/forbided_ip.log",$ip."--".date("Y-m-d H:i:s",time())."--".$uri."\r\n",FILE_APPEND);
    
50. $timepass=$timetem+$allowTime-$time;
    
51. die("Warning:"."<br>"."Sorry,you are forbided by refreshing frequently too much, Pls wait for ".$timepass." seconds to continue!");
    
52. }
    
53. }
    
54. }
    
55. }
    
56. if($yesno) $str.=$checkip.$checkuri.$time."1\r\n";
    
57. file_put_contents($file,$str);

复制代码