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backend.php

+<?php
+header("Content-Type: application/json");
+$servername = "localhost";
+$username = "root";
+$password = "";
+$dbname = "crud_app";
+
+$conn = new mysqli($servername, $username, $password, $dbname);
+if ($conn->connect_error) {
+    die(json_encode(["error" => "Connection failed: " . $conn->connect_error]));
+}
+
+$method = $_SERVER["REQUEST_METHOD"];
+
+if ($method == "GET") {
+    $result = $conn->query("SELECT * FROM users");
+    $users = $result->fetch_all(MYSQLI_ASSOC);
+    echo json_encode($users);
+}
+elseif ($method == "POST") {
+    $data = json_decode(file_get_contents("php://input"), true);
+    $stmt = $conn->prepare("INSERT INTO users (name, email) VALUES (?, ?)");
+    $stmt->bind_param("ss", $data['name'], $data['email']);
+    $stmt->execute();
+    echo json_encode(["message" => "User added successfully"]);
+}
+elseif ($method == "PUT") {
+    parse_str(file_get_contents("php://input"), $_PUT);
+    $id = $_GET['id'];
+    $data = json_decode(file_get_contents("php://input"), true);
+    $stmt = $conn->prepare("UPDATE users SET name=?, email=? WHERE id=?");
+    $stmt->bind_param("ssi", $data['name'], $data['email'], $id);
+    $stmt->execute();
+    echo json_encode(["message" => "User updated successfully"]);
+}
+elseif ($method == "DELETE") {
+    $id = $_GET['id'];
+    $stmt = $conn->prepare("DELETE FROM users WHERE id=?");
+    $stmt->bind_param("i", $id);
+    $stmt->execute();
+    echo json_encode(["message" => "User deleted successfully"]);
+}
+
+$conn->close();
+?>