<!DOCTYPE HTML>
<html lang="en-US">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <form action="" method="POST">
        <input type="text" name="adsoyad" />
        <input type="date" name="dogumtarihi" />
        <input type="submit" value="Gönder" name="gonder" />
    </form>
    <?php
        if(isset($_POST["gonder"])){
            echo 'Benim adım '.$_POST["adsoyad"].', ben '.$_POST["dogumtarihi"].' doğumluyum.';
        }
    ?>
</body>
</html>