PHP批量清空删除指定文件夹内容

PHP批量清空删除指定文件夹内容：

cleancache.php

<?php
// 清文件缓存
$dirs = array(
realpath(dirname(__FILE__) . '/../data/cache_data'),
realpath(dirname(__FILE__) . '/../data/cache_file'),
realpath(dirname(__FILE__) . '/../data/cache_view')
);

// 清理缓存
foreach($dirs as $dir) {
do_rmdir($dir, false);
echo "<div style='border:2px solid green; background:#f1f1f1; padding:20px;margin:20px;width:800px;font-weight:bold;color:green;text-align:center;'>\"" . $dir . "\" have been cleaned clear! </div>";
}

/**
 * 清空/删除 文件夹
 * @param string $dirname 文件夹路径
 * @param bool $self 是否删除当前文件夹
 * @return bool
 */
function do_rmdir($dirname, $self = true) {
if (!file_exists($dirname)) {
return false;
}
if (is_file($dirname) || is_link($dirname)) {
return unlink($dirname);
}
$dir = dir($dirname);
if ($dir) {
while (false !== $entry = $dir->read()) {
if ($entry == '.' || $entry == '..') {
continue;
}
do_rmdir($dirname . '/' . $entry);
}
}
$dir->close();
$self && rmdir($dirname);
}