/**
* Return the most recent modification time of anything in the folder.
*
* @param string $folder The folder, relative to the site root
* @param array $extensionList An option array of file extensions to limit the search to
* @return string Same as filemtime() format.
*/
public static function folderModTime($folder, $extensionList = null)
{
$modTime = 0;
if (!Filesystem::isAbsolute($folder)) {
$folder = Director::baseFolder() . '/' . $folder;
}
$items = scandir($folder);
foreach ($items as $item) {
if ($item[0] != '.') {
// Recurse into folders
if (is_dir("{$folder}/{$item}")) {
$modTime = max($modTime, self::folderModTime("{$folder}/{$item}", $extensionList));
// Check files
} else {
$extension = null;
if ($extensionList) {
$extension = strtolower(substr($item, strrpos($item, '.') + 1));
}
if (!$extensionList || in_array($extension, $extensionList)) {
$modTime = max($modTime, filemtime("{$folder}/{$item}"));
}
}
}
}
//if(!$recursiveCall) self::$cache_folderModTime[$cacheID] = $modTime;
return $modTime;
}
