public function dolar(){


        $dolar = file_get_contents('http://br.financas.yahoo.com/q?s=USDBRL=X');
        $variacao_dolar = preg_match('/<span id=\"yfs_p20_usdbrl=x\">(.*)<\/span>/', $dolar, $matches, PREG_OFFSET_CAPTURE);
        $dolarCompra = preg_match('/<span id=\"yfs_b00_usdbrl=x\">(.*)<\/span>/', $dolar, $matches2, PREG_OFFSET_CAPTURE);
        $dolarVenda = preg_match('/<span id=\"yfs_a00_usdbrl=x\">(.*)<\/span>/', $dolar, $matches3, PREG_OFFSET_CAPTURE);

        $dolarCompra = substr($matches2[0][0], 28, 9);

        $dolarVenda = substr($matches3[0][0], 28, 9);
        $variacao_dolar = substr($matches[0][0], 29, 29);
        $variacao = preg_replace('/\)/', '', $variacao_dolar);

        $path = './';
        echo <<<DOLAR

        <td><strong>DOLAR</strong></td>
        <td>$dolarCompra</td>
        <td>$dolarVenda</td>
        <td class="green"><strong>$variacao</strong></td>
DOLAR;


    }

    public function euro(){

        $dolar = file_get_contents('http://br.financas.yahoo.com/q?s=EURBRL=X');
        $variacao_dolar = preg_match('/<span id=\"yfs_p20_eurbrl=x\">(.*)<\/span>/', $dolar, $matches, PREG_OFFSET_CAPTURE);
        $variacao_dolar = substr($matches[0][0], 29, 29);
        $variacao = preg_replace('/\)/', '', $variacao_dolar);
        $dolar_comercial_compra = $this->xml->euro_real_compra;
        $dolar_comercial_venda = $this->xml->euro_real_venda;
        $path = './';
        echo <<<DOLAR

        <td><strong>EURO</strong></td>
        <td>$dolar_comercial_compra</td>
        <td>$dolar_comercial_venda</td>
        <td class="green"><strong>$variacao</strong></td>
DOLAR;



    }

    public function libra(){


        $dolar = file_get_contents('http://br.financas.yahoo.com/q?s=GBPBRL=X');
        $variacao_dolar = preg_match('/<span id=\"yfs_p20_gbpbrl=x\">(.*)<\/span>/', $dolar, $matches, PREG_OFFSET_CAPTURE);
        $libraCompra = preg_match('/<span id=\"yfs_b00_gbpbrl=x\">(.*)<\/span>/', $dolar, $matches2, PREG_OFFSET_CAPTURE);
        $libraVenda = preg_match('/<span id=\"yfs_a00_gbpbrl=x\">(.*)<\/span>/', $dolar, $matches3, PREG_OFFSET_CAPTURE);
        $variacao_dolar = substr($matches[0][0], 29, 29);
        $libraCompra = substr($matches2[0][0], 28, 9);
        $libraVenda = substr($matches3[0][0], 28, 9);
        $variacao = preg_replace('/\)/', '', $variacao_dolar);

        $path = './';
        echo <<<DOLAR

        <td><strong>LIBRA</strong></td>
        <td>$libraCompra</td>
        <td>$libraVenda</td>
        <td class="green"><strong>$variacao</strong></td>
DOLAR;



    }