Snippet includes & global variable Issues

<?php
/*
Type: Snippet
Name: search_form
Description: Generated Search Form For Products
*/
	ini_set("error_reporting", E_ALL);
	ini_set("display_errors", true);

$cssClass = (isset($cssClass))?$cssClass:"product_search";
$mode = (isset($mode))?$mode:"home";
$submitlabel = ($mode=="home")?"Go":"Search";
$displayresults = ($mode=="home")?"":$modx->runSnippet('search_result_totals');
$basePath = $modx->config['base_path'];

include_once $basePath.'assets/modules/productmanager/config.inc.php';
//global $pm_config;
include_once $basePath.$pm_config["path_module"].$pm_config["path_class"].'options.php';
include_once $basePath.$pm_config["path_module"].$pm_config["path_class"].'categories.php';

$cats = new Categories();
$categories = $cats->getAllCatNames();
...
the code
...
return $outHtml;
?>

<?php 
/*
Type: Snippet
Name: search_result_totals
Description: Search Result Totals for Product Manager
*/

$basePath = $modx->config['base_path'];
include_once $basePath.'assets/modules/productmanager/config.inc.php';
//global $pm_config;
include_once $basePath.$pm_config["path_module"].$pm_config["path_class"].'options.php';
include_once $basePath.$pm_config["path_module"].$pm_config["path_class"].'categories.php';
include_once $basePath.$pm_config["path_module"].$pm_config["path_class"].'fields.php';
include_once $basePath.$pm_config["path_module"].$pm_config["path_class"].'types.php';
include_once $basePath.$pm_config["path_module"].$pm_config["path_class"].'products.php';
include_once $basePath.$pm_config["path_module"].$pm_config["path_class"].'productdata.php';

$cats = new Categories();
$categories = $cats->getAllCatNames();

$catWhere = Array();
foreach($categories as $catid => $catname) {
	if($_REQUEST["cat_".$catid] > 0) {
		$catWhere[] = "( catid = ".$catid." AND optid = ".$_REQUEST["cat_".$catid]." )";
	}
}

$where = implode(" AND ",$catWhere);
if(empty($where)) {
	$where = "1";
}

$sql = "SELECT DISTINCT(prodid) as productid FROM ".$pm_config["db_prefix"].$pm_config["dbt_cat_link"]." WHERE ".$where.";";
$result = $modx->dbQuery($sql);
$rowCount = $modx->recordCount($result);
$start = $_REQUEST["strt"];
$start = 1;
$end = $start + 10;
$retVal = "<p>Displaying {$start} - {$end} of {$rowCount} Products or Services</p>\n";
return $retVal;
?>