<script>
    
    const fiyat = "<?php echo $fiyat; ?>";
    veya
    var fiyat = <?php echo $fiyat; ?>;

    paypal.Buttons({
        createOrder: function(data, actions) {
            return actions.order.create({
                purchase_units: [{
                    amount: {
                        value: fiyat,
                    }
                }]
            });
        },
        onApprove: function(data, actions) {
            return actions.order.capture().then(function(details) {
                alert('Transaction completed by ' + details.payer.name.given_name);
                // Call your backend to save the transaction details
            });
        },
        onError: function(err) {
            console.error('Error occurred: ' + err);
        }
    }).render('#paypal-button-container');
</script>