query($sql) === TRUE) { // Redirect to WhatsApp with pre-filled message $wa_message = "Hello, I want to book an appointment for *$name* with *$doctor* on *$date*."; $wa_url = "https://wa.me/919922346009?text=" . urlencode($wa_message); echo ""; } else { echo "Error: " . $sql . "
" . $conn->error; } } ?>