<?php
class Rates
{
public $list = array();
private $_cache = 'system/kurs.dat';
private $_hour = 0; # Время обновление данных на сайте
private $_imgUp = 'images/up.png';
private $_imgDown = 'images/down.png';
private $_getLink = 'http://www.cbr.ru/scripts/XML_daily.asp?date_req=';
private $_codes = array('840' => 'dollar',
'978' => 'euro',
'398' => 'kzt',
'980' => 'uah');
private $_loaded = false;
function __construct()
{
if ( !$this->_checkServer() )
{
return;
}
$this->_update();
$this->_parse();
# Если проблемы с сервером, пробуем ещё раз
if ( !$this->_loaded && empty($this->list) )
{
$this->_load();
$this->_parse();
}
$this->show();
}
private function _checkServer()
{
$ret = true;
if ( !function_exists('simplexml_load_string') )
{
echo 'Ошибка XML. ';
$ret = false;
}
if ( !ini_get('allow_url_fopen') )
{
echo 'Ошибка URL. ';
$ret = false;
}
if ( file_exists($this->_cache) )
{
if ( !is_writable($this->_cache) )
{
echo 'Ошибка записи файла. ';
$ret = false;
}
}
elseif ( !is_writable( dirname($this->_cache) ) )
{
echo 'Ошибка записи директории. ';
$ret = false;
}
return $ret;
}
private function _update()
{
$update = true;
if ( file_exists($this->_cache) )
{
$new = mktime($this->_hour, 0, 0, date('m'), date('d'), date('Y'));
$last = filemtime($this->_cache);
# Обновление было сегодня
if ($last > $new)
{
$update = false;
}
# Вчерашние данные ещё актуальны
elseif ($last > $new - 24 * 3600 && time() < $new)
{
$update = false;
}
}
if ($update)
{
$this->_load();
}
}
private function _load()
{
$data = array();
# Вчера
$link = $this->_getLink . date('d/m/Y', time() - 24 * 3600);
$data['yesterday'] = file_get_contents($link);
# Сегодня
$link = $this->_getLink . date('d/m/Y');
$data['today'] = file_get_contents($link);
file_put_contents($this->_cache, serialize($data));
$this->_loaded = true;
}
private function _parse()
{
$data = file_get_contents($this->_cache);
$data = unserialize($data);
$day = 'yesterday';
$data[$day] = simplexml_load_string($data[$day]);
foreach($data[$day]->Valute as $item)
{
$val = str_replace(',', '.', (string)$item->Value);
$key = (string)$item->NumCode;
if ( isset($this->_codes[$key]) )
{
$key = $this->_codes[$key];
$this->list[$key][$day] = $val;
}
}
$day = 'today';
$data[$day] = simplexml_load_string($data[$day]);
foreach($data[$day]->Valute as $item)
{
$val = str_replace(',', '.', (string)$item->Value);
$key = (string)$item->NumCode;
if ( isset($this->_codes[$key]) )
{
$key = $this->_codes[$key];
$this->list[$key][$day] = $val;
$val -= $this->list[$key]['yesterday'];
if ($val > 0)
{
$val = '+' . $val;
}
$this->list[$key]['diff'] = $val;
}
}
}
public function showOne($key)
{
global $def_mainlocation;
echo '<strong>' . $this->list[$key]['today'] . '</strong> ';
$diff = $this->list[$key]['diff'];
if ($diff != 0)
{
$img = ($diff > 0) ? $this->_imgUp : $this->_imgDown;
echo '<img src="'.$def_mainlocation.'/' . $img . '" alt="" align="absmiddle" ' .
'title="Курс вчера ' . $this->list[$key]['yesterday'] . ', ' .
$diff . '" />';
}
}
public function show()
{
if ( empty($this->list) )
{
echo 'Cервер недоступен';
return;
}
?>
<table width="100%" border="0" cellspacing="5" cellpadding="0">
<tr>
<td height="3" colspan="2"></td>
</tr>
<tr>
<td width="55%" align="right">Доллар США</td>
<td width="35%"><?php echo $this->showOne('dollar'); ?></td>
</tr>
<tr>
<td width="55%" align="right">Евро</td>
<td width="35%"><?php echo $this->showOne('euro'); ?></td>
</tr>
<tr>
<td width="55%" align="right">100 Казахстанских Тенге</td>
<td width="35%"><?php echo $this->showOne('kzt'); ?></td>
</tr>
<tr>
<td width="55%" align="right">10 Украинских гривен</td>
<td width="35%"><?php echo $this->showOne('uah'); ?></td>
</tr>
</table>
<?php
}
}
?>
