Linux系统下nginx+php清理服务器网站日志怎么弄

<?php
/* 
    清理IIS网站过期日志，释放C盘空间 
*/

$logs_path = "C:\inetpub\logs\LogFiles";    //日志所在路径
$folder_head = "W3SVC";    //日志文件夹名的前缀
$file_head = "u_ex";    //日志文件名的前缀
$file_foot = ".log";    //日志文件名的后缀

$logs_path = str_replace("\\", "/", $logs_path);
if (! file_exists($logs_path)) die('日志目录不存在');
$scan = scandir($logs_path);
$folders = array();    //定义变量存在日志文件夹名

for ($i=0; $i < count($scan); $i++) { 
    if((substr($scan[$i], 0, strlen($folder_head)) == $folder_head) && file_exists($logs_path.'/'.$scan[$i]))
        array_push($folders, $scan[$i]);
}

$today = date('Ymd');
$today = substr($today, 2);
$todayLog = $file_head.$today.$file_foot;


for ($i=0; $i < count($folders); $i++) { 

    $filesInFolder = scandir($logs_path.'/'.$folders[$i]);

    for ($j=0; $j < count($filesInFolder); $j++) { 
        if(($filesInFolder[$j] != $todayLog) && 
            (substr($filesInFolder[$j], 0, strlen($file_head)) == $file_head) &&
            (strrev(substr(strrev($filesInFolder[$j]), 0,strlen($file_foot))) == $file_foot))
            unlink($logs_path.'/'.$folders[$i].'/'.$filesInFolder[$j]);
    }
}

echo '过期日志清理完毕';

?>