visitors使ってたなー

visitors.php

<?php
/**
 * visitorsでログを作るスクリプト
 *
 * need nkf,visitors,apache2
 */
error_reporting(E_ALL);
ini_set('display_errors', 'On');

/**
 * visitors bin path
 */
$visitors_path = '/usr/bin/visitors';

/**
 * apache2 log path
 */
$date = date("Ym");
$log_path = "/var/log/apache2/access_log.{$date}*";

/**
 * output path
 */
$now_date = date("Y-m-d");
$output_path = "/home/halt/public_html/admin/visitors/{$now_date}.html";

if (!file_exists($visitors_path)) {
    debug_print('visitors not found');
    exit();
}

$command = $visitors_path;
$command.= " -A -m 100 ";
$command.= $log_path;
$command.= " | nkf -w -m0 > ";
$command.= $output_path;

debug_print($command);

//system($command);
exec($command);

function debug_print($message)
{
    //print($message . "\n");
}