遍历文件夹

/**
* 计算签名
* @param string $dir 路径
* @param $len 起始路径长度
* @param &array $retArr 返回数组
*/
function __calcSign($dir, $len, &$retArr) {
$dh = opendir($dir);
if (!$dh) {
return;
}
while (($file = readdir($dh)) !== false) {
if ($file === '.' || $file === '..' || $file === '.svn') {
continue;
}
$filename = $dir . DIRECTORY_SEPARATOR . $file;
if (is_dir($filename)) {
call_user_func_array(__FUNCTION__, array($filename, $len, &$retArr));
continue;
}
$reletiveFilename = substr($filename, $len);
$retArr[$reletiveFilename] = md5_file($filename);
}
closedir($dh);
}