写在前面的话
很多人有这样的需求，就是统计网站访问IP以及在线的人数。今天我们就看一下具体实现方法。
开启依赖函数模块
实现这个功能，需要依赖putenv()函数。下面两种方式均可。
更改php.ini文件方法
找到php.ini文件，搜索putenv关键字，删除即可。
isable_functions = passthru,exec,system,putenv,chroot,chgrp,chown,shell_exec,popen,proc_open,pcntl_exec,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,imap_open,apache_setenv
使用宝塔面板
点击左侧软件管理，找到php，然后设置->禁用函数。
删除putenv，然后重启php即可。
实现函数
在count.php同目录下创建文件：count,temp,online。新建文本文档count.txt，去掉扩展名即为count了；
linux系统中请设置文件属性为：777。
文件count.php代码，用到了php函数–explode、isset、empty及sprintf等:
<?php
$file = \"count\"; // 记数文件名称
$startno = \"1000\"; // 起始数值
$tempfile = \"temp\";
$t_now = time();
$t_array = getdate($t_now);
$day = $t_array[\'mday\'];
$mon = $t_array[\'mon\'];
$year = $t_array[\'year\'];
if (file_exists(\"$file\")) {
$count_info=file(\"$file\");
$c_info = explode(\",\", $count_info[0]);
$total_c=$c_info[0];
$yesterday_c=$c_info[1];
$today_c=$c_info[2];
$lastday=$c_info[3];
} else {
$total_c=\"$startno\";
$yesterday_c=\"0\";
$today_c=\"0\";
$lastday=\"0\";
}
if ( !isset($HTTP_COOKIE_VARS[\"countcookie\"]) || $HTTP_COOKIE_VARS[\"countcookie\"] != $day) {
$your_c=1;
$lockfile=fopen(\"temp\",\"a\");
flock($lockfile,3);
putenv(\'TZ=JST-9\');
$t_array2 = getdate($t_now-24*3600);
$day2=$t_array2[\'mday\'];
$mon2=$t_array2[\'mon\'];
$year2=$t_array2[\'year\'];
$today = \"$year-$mon-$day\";
$yesterday = \"$year2-$mon2-$day2\";
if ($today != $lastday) {
if ($yesterday != $lastday) $yesterday_c = \"0\";
else $yesterday_c = $today_c;
$today_c = 0;
$lastday = $today;
}
$total_c++;
$today_c++;
$total_c = sprintf(\"%06d\", $total_c);
$today_c = sprintf(\"%06d\", $today_c);
$yesterday_c = sprintf(\"%06d\", $yesterday_c);
setcookie(\"countcookie\",\"$day\",$t_now+43200);
$fp=fopen(\"$file\",\"w\");
fputs($fp, \"$total_c,$yesterday_c,$today_c,$lastday\");
fclose($fp);
fclose($lockfile);
}
if ( empty( $your_c ) ) $your_c = 1;
setcookie(\"yourcount\",$your_c+1,$t_now+43200);
$your_c = sprintf(\"%06d\", $your_c);
//////////////////////////开始统计在线
$filename=\"online\";
$onlinetime=600; //同一IP在线时间，单位：秒
$online_id=file($filename);
$total_online=count($online_id);
$ip=getenv(\"REMOTE_ADDR\");
$nowtime=time();
for($i=0;$i<$total_online;$i++){
$oldip=explode(\"||\",$online_id[$i]);
$hasonlinetime=$nowtime-$oldip[0];
if($hasonlinetime<$onlinetime and $ip!=$oldip[1]) $nowonline[]=$online_id[$i];
}
$nowonline[]=$nowtime.\"||\".$ip.\"||\";
$total_online=count($nowonline);
$fp=fopen($filename,\"w\");
rewind($fp);
for($i=0;$i<$total_online;$i++){
fputs($fp,$nowonline[$i]);
fputs($fp,\"n\");
}
fclose($fp);
if($total_online==0)$total_online=1;
$total_online = sprintf(\"%06d\", $total_online);
///////////////////////////////////////////////////////
echo \"document.write(\"·总IP访问:\".$total_c.\"\");\";
echo \"document.write(\"<br>\");\";
echo \"document.write(\"·昨日访问:\".$yesterday_c.\"\");\";
echo \"document.write(\"<br>\");\";
echo \"document.write(\"今日IP:\".$today_c.\"\");\";
echo \"document.write(\" \");\";
echo \"document.write(\"·您 访 问:\".$your_c.\"\");\";
echo \"document.write(\"<br>\");\";
echo \"document.write(\"当前在线:\".$total_online.\"\");\";
exit;
?>
调用
用JS调用文件count.php
在需要加入统计的的地方，添加：
<script src=\"/php/count.php\"></script>
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