php 删除目录(删除目录下所有文件)

/**
* 清空目录下所有文件
*/
function delStatic($static = '') {

if(empty($static) || $static == '') {
$static = g('static');
$dir = $GLOBALS['cms_save_path']. '/' .$static;
}
else {
$dir = $static;
}
echo $dir;
if(is_dir($dir)){
$dh = opendir($dir);

while ($file = readdir($dh))
{
if ($file != "." && $file != "..")
{
$fullpath = $dir . "/" . $file;
if (!is_dir($fullpath))
{
unlink($fullpath);
}
else {
echo '<br />';
$this->delStatic($fullpath);
}
}
}

closedir($dh);
if (rmdir($dir))
{
echo "删除成功<br />";
} else
{
exit("删除成功");
}
}
else {
exit("没找到文件");
}

}