PHP は、一定期間内にアクセスされなかった画像をクリアする実装を実装します

<?php
/**
 * 图片清理计划程序，删除文件下两周没有访问的文件
 */
$sRootPath = dirname(__FILE__);
//define(TIME_LINE ,"-7 day");
//删除几天没有访问图片的时间
$dir = $sRootPath .DIRECTORY_SEPARATOR.&#39;upload&#39;;
$iTimeLine = strtotime("-7 day");
//$iTimeLine = time();
$sHandDate = date("Ymd");
$sLogDir = dirname(__FILE__).DIRECTORY_SEPARATOR.&#39;Imglog&#39;;
$sLog = $sLogDir.DIRECTORY_SEPARATOR.$sHandDate.&#39;.txt&#39;;
if(!file_exists($sLogDir)) mkdir($sLogDir, 0777,true);
_clearFile($dir , $iTimeLine, $sLog);
$sEnd = &#39;AT&#39;."\\t" .date("Y-m-d H:i:s")."\\t".&#39;EXEC OVER&#39;."\\n";
echo $sEnd;
error_log($sEnd, 3, $sLog);
/**
 * 清除文件操作，传入需要清除文件的路径
 * @param unknown_type $sPath
 */
function _clearFile($sPath, $iTimeLine, $sLog){
 if(is_dir($sPath)){
  $fp = opendir($sPath);
  while(!false == ($fn = readdir($fp))){
   if($fn == &#39;.&#39; || $fn ==&#39;..&#39;) continue;
   $sFilePath = $sPath.DIRECTORY_SEPARATOR.$fn;
   _clearFile($sFilePath ,$iTimeLine, $sLog);
  }
 }else{  
  if($sPath != &#39;.&#39; && $sPath != &#39;..&#39;){
  //. ..文件直接跳过，不处理
   $iLastView = fileatime($sPath);
   if($iLastView < $iTimeLine){
    if(@unlink($sPath) === true){
     //echo date("Y-m-d H:i:s").&#39;成功删除文件&#39;.$sPath;
     //file_put_contents($sLog,&#39;success del file :&#39;.$sPath."\\n", FILE_APPEND);
     //exit;
     $str =date("Y-m-d H:i:s")."\\t".&#39;success del file :&#39;.&#39;[&#39;.$sPath.&#39;]&#39;."\\n";
     error_log($str, 3, $sLog);
     //exit;
    }
   }
  }
 }
}
?>