Clean up un-used files in EDocman

cleanup.php

<?php
function files_clean_up()
{
	jimport('joomla.filesystem.folder');
	jimport('joomla.filesystem.file');
	$db = JFactory::getDbo();
	$config = EdocmanHelper::getConfig();
	$path = $config->documents_path;
	$pathLength = strlen($path) ;
	$files = JFolder::files($config->documents_path, '.', true, true);
	$removeFiles = array();
	for ($i = 0 , $n = count($files); $i < $n; $i++) 
	{			
		$file = $files[$i] ;
		$file = substr($file, $pathLength + 1) ;
		$file = str_replace("\\", '/', $file) ;
		$sql = 'SELECT COUNT(*) FROM #__edocman_documents WHERE filename='.$db->quote($file);
		$db->setQuery($sql);
		$total = $db->loadResult();
		if (!$total)
		{
			$removeFiles[] = $files[$i];
		}			
	}
	print_r($removeFiles);				
}