需求:找到访问小图最多的前三个ip,
日志文件20121030.log
0 192.168.1.102 small_0.gif
1 192.168.1.113 big_1.gif
2 192.168.1.110 small_2.gif
3 192.168.1.114 small_3.gif
4 192.168.1.118 small_4.gif
5 192.168.1.109 big_5.gif
6 192.168.1.110 small_6.gif
7 192.168.1.102 small_7.gif
8 192.168.1.110 small_8.gif
9 192.168.1.119 big_9.gif
10 192.168.1.112 small_10.gif
。。。中间省略。。。
91 192.168.1.112 small_91.gif
92 192.168.1.112 small_92.gif
93 192.168.1.108 small_93.gif
94 192.168.1.105 big_94.gif
95 192.168.1.117 big_95.gif
96 192.168.1.119 big_96.gif
97 192.168.1.105 big_97.gif
98 192.168.1.120 small_98.gif
99 192.168.1.114 small_99.gif
$handle=fopen('20121030.log','r');
$countip=array();//统计ip
if($handle) {
while($buffer=fgets($handle)) {//逐行读取文件
$arr= preg_split('/\t/',$buffer);
if(strstr($arr[2],"small")){//小图
//ip为键,出现次数为指
$countip[$arr[1]] =$countip[$arr[1]] ? ++$countip[$arr[1]] : 1;
}
}
fclose($handle);
arsort($countip);//ip出现次数倒序
$topip=array_slice($countip,0,3);//取前三个
var_dump($topip);
}