<form action="gonder.php" method="POST">
isim <input type="text" name="isim">
soyisim <input type="text" name="soyisim">
<input type="submit" value="Gönder" />
</form>

$isim = $post['isim'];
$soyisim = $post['soyisim'];

echo "$isim $soyisim";