catalogFilter.php

<?php
//Filter Fields Settings
$filter = array();

//Radio, Select & Text Fields Type
if($_GET['floor']) {
	$filter[] = 'floor='.$_GET['floor'];
}

//Two Text Fields From To
if($_GET['area_from']) {
	$filter[] = 'area>='.$_GET['area_from'];
}
if($_GET['area_to']) {
	$filter[] = 'area<='.$_GET['area_to'];
}

//Checkbox Type
if($_GET['garage']) {
	$filter[] = 'garage=1';
}

//End Settings

//Sort
if($_GET['sortby']) {
	$sortby = $_GET['sortby'];
} else {
	$sortby = 'pagetitle';
}
if($_GET['sortdir']) {
	$sortdir = $_GET['sortdir'];
} else {
	$sortdir = 'asc';
}
//End Sort

//Offset
$offset = 0;
if($_GET['offset']){
	$offset = $_GET['offset'];
}

if($filter) {
	$where = $modx->toJSON(array($filter));
} else {
	$where = '';
}

$params_count = array(
	'parents' => $parents,
	'limit' => 0,
	'tpl' => '@INLINE ,',
	'select' => 'id',
	'includeTVs' => $fields,
	'showHidden' => '1',
	'where' => $where
	);

$count = $modx->runSnippet('pdoResources',$params_count);
$count = count(explode(',',$count))-1;
$modx->setPlaceholder('count',$count);

$params = array(
	'parents' => $parents,
	'limit' => $limit,
	'offset' => $offset,
	'tpl' => $tpl,
	'select' => 'id,pagetitle,introtext,content',
	'includeTVs' => $fields,
	'showHidden' => '1',
	'sortby' => $sortby,
	'sortdir' => $sortdir,
	'where' => $where
	);

$more = $count - $offset - $limit;
$lim = $more > $limit ? $limit : $more;

$button = '';
if($more > 0){
	$button = '<div class="ajax-filter-count" data-count="'.$count.'"><a href="#" class="ajax-more">Загрузить еще '.$lim.' из '.$more.'</a></div>';
}

return $modx->runSnippet('pdoResources',$params).$button;