fill the gaps in the numbering

<?php
// Set this to your MODx Directory
$base_path = '/var/www/modx/';

include($base_path.'manager/includes/config.inc.php');

$action = (string)$_REQUEST['action'];

if (!$rs = mysql_connect($database_server, $database_user, $database_password, true))
	die('Unable to connect to server');
if (!mysql_select_db(trim($dbase, '`')))
	die('Unable to select database');

switch ($action) {
	case 'doc_groups':
		$sql = 'SELECT id, document_group AS dg, document, count(*) as gc FROM '.$table_prefix.'document_groups
			GROUP BY document, dg
			ORDER BY gc DESC';
		$q = mysql_query($sql, $rs);
		if ($q === false)
			die('Error in query');

		while ($item = mysql_fetch_assoc($q)) {
			if ($item['gc'] <= 1) {
				break;
			}
			$sql = 'DELETE FROM '.$table_prefix.'document_groups WHERE id='.$item['id'];
			echo $sql.'<br/>';
			mysql_query($sql, $rs);
		}
		break;
	case 'tmplvars':
		$sql = 'SELECT id, tmplvarid, contentid, value, count(*) as tvcount FROM '.$table_prefix.'site_tmplvar_contentvalues GROUP BY tmplvarid, contentid';
		$q = mysql_query($sql, $rs);
		while ($item = mysql_fetch_assoc($q)) {
			if ($item['tvcount'] <= 1) continue;
			print_r($item);
			echo "<br/>";
		}
		break;
	case 'doc_id':
		$table = (string)$_REQUEST['table'];
		if (!$table) $table = 'site_content';
		$sql = 'SELECT id FROM '.$table_prefix.$table.' ORDER BY id';
		$q = mysql_query($sql, $rs);
		$previd = 0;
		echo '<pre>';
		$output = 'Open IDs in '.$table_prefix.$table.':';
		while ($item = mysql_fetch_assoc($q)) {
			if ($item['id'] - $previd > 1) {
				for ($i = ($previd+1); $i < $item['id']; $i++) {
					$output .= ' '.$i;
					if (strlen($output) > 140) {
						echo $output."\n";
						$output = '';
					}
				}
			}
			$previd = $item['id'];
		}
		echo $output.'</pre>';
		break;
	default:
		echo "Select an action.<br/>";
		break;
}
echo "Query Complete on table <tt>".$dbase."</tt><br/>";