本文实例讲述了PHP实现图片自动清理的方法。分享给大家供大家参考。具体实现方法如下：

<?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;    }   }  } }}?>

希望本文所述对大家的php程序设计有所帮助。