统计log日志并排序的php程序

2. function topIp($logfile,$length=3){
3. $handle = fopen($logfile, 'r');
4. $countip = array();//统计ip
5. if ($handle) {
6. while ($buffer = fgets($handle)) {//逐行读取文件
7. $arr = preg_split('/\t/',$buffer);
8. if(strstr($arr[2],"small")){//小图
9. //ip为键，出现次数为指
10. $countip[$arr[1]] = $countip[$arr[1]] ? ++$countip[$arr[1]] : 1;
11. }
12. }
13. fclose($handle);
14. arsort($countip);//ip出现次数倒序
15. return array_slice($countip,0,$length);//提取
16. }
17. }
18. $topips = topIp('20121030.log',3);
19. var_dump($topips);
20. ?>

输出的结果： array(3) { ["192.168.1.110"]=> int(10) ["192.168.1.108"]=> int(8) ["192.168.1.120"]=> int(7) }