PHP Decode

<?php 
include "bilgiler.php"; 
 
$conn = new mysqli($servername, $username, $password, $database); 
if ($conn->connect_error) { 
    die("Connection failed: " . $conn->connect_error); 
} 
 
if ($_SERVER["REQUEST_METHOD"] == "POST") { 
    $isimsoyisim = mysqli_real_escape_string($conn, $_POST['isimsoyisim']); 
    $email = mysqli_real_escape_string($conn, $_POST['email']); 
    $tel = mysqli_real_escape_string($conn, $_POST['tel']); 
    $yasi = mysqli_real_escape_string($conn, $_POST['yasi']); 
    $meslek = mysqli_real_escape_string($conn, $_POST['meslek']); 
    $il = mysqli_real_escape_string($conn, $_POST['il']); 
 
    $email_check_query = "SELECT * FROM eleman WHERE email='$email' LIMIT 1"; 
    $result = $conn->query($email_check_query); 
    if ($result->num_rows > 0) { 
        echo '<script>alert("Bu e-posta adresi zaten bavuruda kullanlm.");</script>'; 
    } else { 
        $sql = "INSERT INTO eleman (isimsoyisim, email, tel, yasi, meslek, il)  
                VALUES ('$isimsoyisim', '$email', '$tel', '$yasi', '$meslek', '$il')"; 
                 
        if ($conn->query($sql) === TRUE) { 
            echo '<script>alert("Bavurunuz Baaryla Alnd. En Ksa Srede Geri Dn Salanacaktr.");</script>'; 
            echo '<script>setTimeout(function(){ window.location.href = "http://www.instagram.com/makrolifee"; }, 2000);</script>'; 
        } else { 
            echo "Hata: " . $sql . "<br>" . $conn->error; 
        } 
    } 
} 
 
$conn->close(); 
?>