function setWritable($root, $paths)
{
foreach ($paths as $writable) {
if (!is_dir("{$root}/{$writable}")) {
echo " create dir and chmod 0777 {$writable}\n";
FileHelper::createDirectory("{$root}/{$writable}", 0777);
} else {
echo " chmod 0777 {$writable}\n";
@chmod("{$root}/{$writable}", 0777);
}
}
}