gistfile1.txt

// 60 seconds * 60 minutes * 24 hours = 1 day refresh
	$refreshInterval = 60*60*24; 
	
	$input = range(1,30);
	$arr = array_rand($input, 4);
	
	if ( false === ( $featured_products = get_transient( 'featured_products' ) ) ) {
	// It wasn't there, so regenerate the data and save the transient

	$request_url = 'http://makershed.com/net/webservice.aspx?api_name=generic\featured_products';
	
	$xml = simplexml_load_file($request_url);
	
	$featured_products = $xml->Product;
	
	set_transient('featured_products', $featured_products, $refreshInterval );
	}