Processwire Result Filters Year, Limit

// Override limit based on user input
if($userLimit = (int) $input->get->limit) {
	$remeberLimit = "?limit=$userLimit";
	$limit = $userLimit;
	$input->whitelist('limit', $limit);
}

// Get year filter
if($userYear = (int) $sanitizer->selectorValue($input->get->year)) {
	$year = $userYear;
	$input->whitelist('year', $year);
	$start = ', date>'.strtotime("01.01.$year");
	$end = ', date<'.strtotime("31.12.$year");
}
else {
	$start = $end = '';
}


//Get album years if any
foreach($page->children->sort('-date') as $years) {
	$years->of(false);
	if($years->date) $yearsList[] = date('Y', $years->date);
	$years->of(true);
}

if(count(array_unique($yearsList)) > 1 || count($page->children) > $limit) {
	$content .= "<div class='row'><div class='right'>";
	//Output unique years as selectbox
	if(count(array_unique($yearsList)) > 1) {
		$content .= "<form class='left' action='./' method='get'><select name='year' class='submitOnChange'>";
			foreach(array_unique($yearsList) as $y) $content .= "<option value='{$y}'>{$y}</option>";
		$content .= "</select></form>";
	}
		
	//Output limit selectbox if $children > $limit
	if(count($page->children) > $limit) {
		$limiters = array((int) $page->limit => (int) $page->limit.' Alben', '0' => 'Alle anzeigen');
		$content .= "<form class='left' action='./' method='get'><select name='limit' class='submitOnChange'>";
			foreach($limiters as $l => $label) $content .= "<option value='{$l}'>{$label}</option>";
		$content .= "</select></form>";
	}
	$content .= "</div></div>";
} //endif filter