search-processor. processwire http://processwire.com/talk/topic/3671-ohmspeakercom/page-2#entry36929

search-processor.php

<?php 

// check if there are GET variables present in the URL
if(count($input->get)) {

  $selector = '';	

if($input->get->application) {
	$application = $sanitizer->pageName($input->get->application); 
	$appid = $pages->get("template=product-options, name=$application");
	$parents = $pages->find("product_app_select=$appid");	
	$selector .= "parent=$parents, ";
}

// if a use is specified, then we limit the results to having that use as their parent
if($input->get->product_use) {
	$use= $pages->get("/speakers/" . $sanitizer->pageName($input->get->product_use)); 
	if($use->id) {
		$use = $use->children;
		$selector .= "parent=";
		foreach($use as $u) {
			$selector .= "|$u";
			$input->whitelist('use', $u->name);
			}
		$selector .= ", ";
	}
}

if($input->get->length) {
	$length = (int) $input->get->length;
}

if($input->get->width) {
	$width = (int) $input->get->width;
}

if($input->get->height) {
	$height = (int) $input->get->height;
}

if($input->get->width && $input->get->length && $input->get->height) {
	$roomcf = $width * $length * $height;
	$s_selector .= "roomsize_min<=$roomcf, roomsize_max>=$roomcf, ";
}

if($input->get->price) {
	$price = $sanitizer->selectorValue($input->get->price); 
	$selector .= "product_price<=$price, ";
}

if($input->get->distance) {
	$distance = $sanitizer->selectorValue($input->get->distance); 
	$selector .= "speaker_distance>=$distance, ";
}

if($input->get->series) {
	$series = $sanitizer->selectorValue($input->get->series); 
	$selector .= "product_series=$series, ";
}

if($input->get->name) {
	$name = $sanitizer->selectorValue($input->get->name); 
	$selector .= "product_name%=$name, ";
}

	$out = '';
	$selector .= "template=product-child, ";
	$matches = $pages->find("$selector, $s_selector, sort=product_price, limit=150"); 
	
	if($input->get->width && $input->get->length && $input->get->height) {
	$s_matches = $pages->find("$selector, roomsize_min=, roomsize_max="); 
	$matches->import($s_matches)->sort('product_price');
	}
	
	$count = count($matches); 

	if($count) {
		$out .= "<h3 class='res-count'>Found $count products matching your search:</h3>";

	} else {
		$out .= "<h3>Sorry, no products were found that match.</h3>";
	}
} else {
	$out .= "<h3>Please select one or more options to return results.</h3>";
}

?>