PHP批量清空刪除指定文件夾內容

PHP批量清空刪除指定文件夾內容：

cleancache.php

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

// 清理緩存
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/刪除 文件夾
 * @param string $dirname 文件夾路徑
 * @param bool $self 是否刪除當前文件夾
 * @return bool
 */
function do_rmdir($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);
}