<?php
  #@author ismet işcan (Dr.iq)
  #@copyright 2008
function ytl_cevir($miktar)
{
    $baglanti = implode('',file('http://www.tcmb.gov.tr/kurlar/today.html'));
    preg_match('#ABD DOLARI[[:space:]]+([0-9\.]+)[[:space:]]+([0-9\.]+)#',$baglanti,$dolar);
    $alis  = $dolar[1];
    $satis = $dolar[2];
    $ytl = ($miktar * $alis);
    return $ytl;
}
echo ytl_cevir(100);
?>

<?php
 $urunfiyat= 150; //150 Amerikan Doları
 
  function ytl_cevir($miktar)
{
    $baglanti = implode('',file('http://www.tcmb.gov.tr/kurlar/today.html'));
    preg_match('#ABD DOLARI[[:space:]]+([0-9\.]+)[[:space:]]+([0-9\.]+)#',$baglanti,$dolar);
    $alis  = $dolar[1];
    $satis = $dolar[2];
    $ytl = ($miktar * $alis);
    return $ytl;
}

  function kdvhesap($fatura) {
      $vergi = 1.18;
      $vergiharic = $fatura / $vergi;
      $vergitutari = $fatura - $vergiharic;

      echo "Fatura Tutari: ".number_format($fatura,2)." YTL <br>";
      echo "%18 KDV: ".number_format($vergitutari,2)." YTL <br>";
      echo "Genel Toplam: ".number_format($fatura,2)." YTL <br>";
      }
  
  $fiyat = ytl_cevir($urunfiyati);
  kdvhesap($fiyat); 
  
  ?>