PHP实现图片自动清理的方法

<?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.'upload'; $iTimeLine = strtotime("-7 day"); //$iTimeLine = time(); $sHandDate = date("Ymd"); $sLogDir = dirname(__FILE__).DIRECTORY_SEPARATOR.'Imglog'; $sLog = $sLogDir.DIRECTORY_SEPARATOR.$sHandDate.'.txt'; if(!file_exists($sLogDir)) mkdir($sLogDir, 0777,true); _clearFile($dir , $iTimeLine, $sLog); $sEnd = 'AT'."\\t" .date("Y-m-d H:i:s")."\\t".'EXEC OVER'."\\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 == '.' || $fn =='..') continue; $sFilePath = $sPath.DIRECTORY_SEPARATOR.$fn; _clearFile($sFilePath ,$iTimeLine, $sLog); } }else{ if($sPath != '.' && $sPath != '..'){ //. ..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").'成功删除文件'.$sPath; //file_put_contents($sLog,'success del file :'.$sPath."\\n", FILE_APPEND); //exit; $str =date("Y-m-d H:i:s")."\\t".'success del file :'.'['.$sPath.']'."\\n"; error_log($str, 3, $sLog); //exit; } } } } } ?>