A script to rename folders output from DateTree. Directories like 2017-03-27 would be renamed 20170327NikonDump. If that directory exists the contents of 2017-03-27 would be moved into it and deleted.

rename_datetree_folders.php

<?php

$suffix = "NikonDump";

$dirs = glob("*", GLOB_ONLYDIR);
foreach ($dirs as $k=>$dir) {
	$dumpdir = preg_replace("/^(\d{4})-(\d{2})-(\d{2})$/", "\${1}\${2}\${3}{$suffix}", $dir);
	// Uncomment this line if you are only import new directories of the $suffix type.
	// So if you imported everything from a Nikon camera then you can just uncomment
	// this rename because all of the photos would be new. You also have to make sure all
	// of the dates of these photos are new and that no existing directory exists.
	//rename($dir, $dumpdir); continue;
	if (preg_match("/^\d{4}-\d{2}-\d{2}$/", $dir)) {
		if (file_exists($dumpdir)) {
			$cmd = "mv {$dir}/* {$dumpdir}/";
			print("{$cmd}\n");
			system($cmd);

			$cmd = "rmdir {$dir}";
			print("{$cmd}\n");
			system($cmd);
		}
	} else {
		rename($dir, $dumpdir);
	}
}