Доработка парсера курса валют центробанка

<?php

if(!defined('DATALIFEENGINE')) {die("Hacking attempt!");}
$cache_file=$_SERVER['DOCUMENT_ROOT']."/engine/cache/usd.tmp";

if (file_exists( $cache_file ) && date('H',filemtime($cache_file))== date("H", mktime(date("H"), 0, 0, 0, 0, 0))){
    $f=fopen($cache_file,"rb");
    $inf=fread($f,filesize($cache_file));
} else {

$tday = date("d/m/Y"); 
$yday = date("d/m/Y",strtotime("-1 day")); // Вчера
$td = date('d.m.Y');
$yd = date("d.m.Y",strtotime("-1 day")); //Вчера

$file = simplexml_load_file("http://www.cbr.ru/scripts/XML_dynamic.asp?date_req1=".$yday."&date_req2=".$tday."&VAL_NM_RQ=R01235"); //USD
$xml = $file->xpath("//Record[@Date='".$td."']"); $usd = str_replace(',', '.', strval($xml[0]->Value));
$xml = $file->xpath("//Record[@Date='".$yd."']"); $usd2 = str_replace(',', '.', strval($xml[0]->Value));

$file = simplexml_load_file("http://www.cbr.ru/scripts/XML_dynamic.asp?date_req1=".$yday."&date_req2=".$tday."&VAL_NM_RQ=R01239"); //Euro
$xml = $file->xpath("//Record[@Date='".$td."']"); $euro = str_replace(',', '.', strval($xml[0]->Value));
$xml = $file->xpath("//Record[@Date='".$yd."']"); $euro2 = str_replace(',', '.', strval($xml[0]->Value));

$raz = $usd-$usd2; if ($raz>0) {$color="green"; $plus="+";} elseif ($raz<0) {$color="red";} else {$color="#999"; $plus="";}
$raz2 = $euro-$euro2; if ($raz2>0) {$color2="green"; $plus2="+";} elseif ($raz2<0) {$color2="red";} else {$color2="#999"; $plus2="";}

$usd = number_format($usd, 3);
$raz = number_format($raz, 3);
$euro = number_format($euro, 3);
$raz2 = number_format($raz2, 3);

$inf = "
<style>td{padding:0 5px}</style><table>\n
<tr><td style='color:green'>&dollar;</td><td>".$usd."</td><td style='color:".$color."' align='right'>".$plus.$raz."</td></tr>\n
<tr><td style='color:orange'>&euro;</td><td>".$euro."</td><td style='color:".$color2."' align='right'>".$plus2.$raz2."</td></tr>\n
</table>";

@file_put_contents($cache_file,$inf); 
}