admin.php

<?php
$servername = "localhost";
$username = "root";
$password = "";
$database = "homestay_db";

// Create connection
$conn = new mysqli($servername, $username, $password, $database);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Prepare and bind
$stmt = $conn->prepare("INSERT INTO customers (name, email, phone, address, city) VALUES (?, ?, ?, ?, ?)");
$stmt->bind_param("sssss", $name, $email, $phone, $address, $city);

// Set parameters and execute
$name = $_POST['name'];
$email = $_POST['email'];
$phone = $_POST['phone'];
$address = $_POST['address'];
$city = "Shimla";

if ($stmt->execute()) {
    echo "New customer added successfully";
} else {
    echo "Error: " . $stmt->error;
}

$stmt->close();
$conn->close();
?>