COMPUTER SCIENCE: Aralık 2017

<?php
session_start();
$letters=array("a","b","c");
$randomselect=rand(0,2);
$random=rand(10000000,90000000);
$text=$letters[$randomselect].$random;
$_SESSION["captcha"]=$text;
$pic=imagecreatetruecolor(100,30);
$backgroucolor=imagecolorallocate($pic,55,55,55);
$fontcolor=imagecolorallocate($pic,35,255,155);
imagefill($pic,0,0,$backgroucolor);
imagestring($pic,5,5,5,$text,$fontcolor);
header("Cache-Control:no-cache");
header("Content-type:image/png");
imagepng($pic);
imagedestroy($pic);

?>

---------------------------------------------------------------------------

<!DOCTYPE html>

<html>

<head>

</head>

<body>

<tr>

<td>

Please enter in the picture

</td>

<td>

</td>

</tr>

<tr>

</td>

<td>

</td>

</tr>

</table>

</body>

</html>

----------------------------------------------------------------------------------------------------

<?php

session_start();

if(isset($_REQUEST["captcha"] && $_REQUEST["captcha"]!=""

&& $_SESSION["captcha"]=$_REQUEST["captcha"]){

echo "TRUE";

}

else

echo "FALSE";

<?php

$linkdolar="http://www.tcmb.gov.tr/kurlar/today.xml";

$data = new SimpleXMLElement($linkdolar,0,true);

$dizi=array();

$dolaralis=array();

foreach ($data as $value)

{

array_push($dizi,$value->Isim);

array_push($dolaralis,$value->ForexSelling);

}

?>

--------------------------------------------------------------------------------------------------------



<?php

function getir($key){

if(isset($_POST[$key]) && strlen($_POST[$key])>0)

return $_POST[$key];

return false;

}

$dolartl = "";

$miktar = "";

$sonuc = "";

if(count($_POST)==4)

{

$dolartl = getir("dolartl");

$miktar = getir("miktar");

$secim1 = getir("secim1");

$secim2 = getir("secim2");

if (!($dolartl && $miktar && $secim1 && $secim2)) {

$sonuc="veri girisi hatali";

}

else

{

if($secim1!=$secim2)

{

include "kur.php";

$kur = new kur($dolartl);

$tip=$secim1.$secim2;

$deger=$kur->donustur($tip,$miktar);

$sonuc=$miktar." ".$secim1."<br>";

$sonuc.=$deger." ".$secim2;

}

else

$sonuc="secimler ayni!";

}

}

?>

<html>

<head>

<meta charset="UTF-8">

</head>

<body>

<form method="POST">

<table border="3">

<tr>

<?php include "Cek.php"; ?>

<td>Dolar</td>

<td><input type="text" name="dolartl" value="<?php echo $dolaralis[0]; ?>"> </td>

</tr>

<tr><td colspan="2"><br></td></tr>

<tr>

<td>Miktar:</td>

<td><input type="text" name="miktar" value="<?php echo $miktar; ?>"></td>

</tr>

<tr>

<td>

Seçim-1:

</td>

<td>

<input type="radio" name="secim1" value="TL" checked>TL

<input type="radio" name="secim1" value="$">USD

</td>

</tr>

<tr>

<td>

Seçim-2:

</td>

<td>

<input type="radio" name="secim2" value="TL" checked>TL

<input type="radio" name="secim2" value="$">USD

</td>

</tr>

<?php

if (strlen($sonuc) > 0)

echo "<tr><td colspan='2' style='text-align: center; color: #ff6144;'>" . $sonuc . "</td></tr>";

?>

<tr><td colspan="2" style=text-align:center><input type="submit" value="Cevir"></td></tr>

</table>

</form>

</body>

</html>

---------------------------------------------------------------------------------------



<?php

class kur

{

public $dolartl;

public function __construct($dolartl)

{

$this->dolartl=$dolartl;

}

public function donustur($tip,$miktar)

{

switch ($tip)

{

case "TL$": return $this->tl2dolar($miktar);

case "\$TL": return $this->dolar2tl($miktar);

default: return "Seçimler Uygun Değil!";

}

}

public function tl2dolar($miktar)

{

$sonuc=$miktar/$this->dolartl;

return round($sonuc,2);

}

public function dolar2tl($miktar)

{

$sonuc=$miktar*$this->dolartl;

return round($sonuc,2);

}

}

?>

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