php定时删除文件夹下文件(清理缓存文件)_php技巧
那么有没有方法自动清理临时文件夹呢?
以下代码就是一个简单定时清理文件夹下文件的php代码。
ps:这个代码如果不重启网站会一直执行下去,所以只用作于本地环境测试,请别在网站上测试。
ignore_user_abort(); //客户端断开时,可以让脚本继续在后台执行
set_time_limit(0); //忽略php.ini设置的脚本运行时间限制
$interval = 5*60; //设置执行周期,单位为秒,5分钟为 5*60=300
do{
$dir = "temp/"; //你的临时目录位置
$handle=opendir("{$dir}/");
while (false !== ($file=readdir($handle))) {
if ($file!="." && $file!=".." && !is_dir("{$dir}/{$file}")) {
@unlink ("{$dir}/{$file}");
}
}
closedir($handle); //关闭由 opendir() 函数打开的目录
sleep($interval); //执行一个周期后,休眠$interval时间,休眠结束后脚本继续执行
}while(true); //周期性执行脚本
根据网上的一个思路来的,建一个flag.txt文件,在里面输入1或者0,“0”表示停止执行,“1”表示继续执行。这样的话就可以开始和停止了。
$flag = 1; //将执行标志设置为1,默认为执行
ignore_user_abort(); //客户端断开时,可以让脚本继续在后台执行
set_time_limit(0); //忽略php.ini设置的脚本运行时间限制
$interval = 5*60; //设置执行周期,单位为秒,5分钟为 5*60=300
do{
$flagfile = "flag.txt"; //标志放置在文件“flag.txt”中。“0”表示停止执行,“1”表示继续执行
if(file_exists($flagfile) && is_readable($flagfile)) { //读取文件内容
$fh = fopen($flagfile,"r");
while (!feof($fh)) {
$flag = fgets($fh); //存储标志
}
fclose($fh);
}
$dir = "temp/"; //你的临时目录位置
$handle=opendir("{$dir}/");
while (false !== ($file=readdir($handle))) {
if ($file!="." && $file!=".." && !is_dir("{$dir}/{$file}")) {
@unlink ("{$dir}/{$file}");
}
}
closedir($handle); //关闭由 opendir() 函数打开的目录
sleep($interval); //执行一个周期后,休眠$interval时间,休眠结束后脚本继续执行
}while($flag);
php删除文件夹及其文件夹下所有文件
function deldir($dir) {
//先删除目录下的文件:
$dh=opendir($dir);
while ($file=readdir($dh)) {
if($file!="." && $file!="..") {
$fullpath=$dir."/".$file;
if(!is_dir($fullpath)) {
unlink($fullpath);
} else {
deldir($fullpath);
}
}
}
closedir($dh);
//删除当前文件夹:
if(rmdir($dir)) {
return true;
} else {
return false;
}
}
?>
实例:删除某个文件夹下的所有“.svn”文件夹(包括其内容也要被删除).
function delsvn($dir) {
$dh=opendir($dir);
//找出所有".svn“ 的文件夹:
while ($file=readdir($dh)) {
if($file!="." && $file!="..") {
$fullpath=$dir."/".$file;
if(is_dir($fullpath)) {
if($file==".svn"){
delsvndir($fullpath);
}else{
delsvn($fullpath);
}
}
}
}
closedir($dh);
}
function delsvndir($svndir){
//先删除目录下的文件:
$dh=opendir($svndir);
while($file=readdir($dh)){
if($file!="."&&$file!=".."){
$fullpath=$svndir."/".$file;
if(is_dir($fullpath)){
delsvndir($fullpath);
}else{
unlink($fullpath);
}
}
}
closedir($dh);
//删除目录文件夹
if(rmdir($svndir)){
return true;
}else{
return false;
}
}
$dir=dirname(__FILE__);
//echo $dir;
delsvn($dir);
?>

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