api.php

<?php
header("Access-Control-Allow-Origin: " . ALLOWED_ORIGIN);
header("Content-Type: application/json; charset=UTF-8");
header('Access-Control-Allow-Methods: GET, POST, PUT, DELETE');
header("Access-Control-Allow-Headers: Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With");

include 'db.php';

$request = $_SERVER['REQUEST_METHOD'];
$data = json_decode(file_get_contents('php://input'), true);

switch ($request) {
    case 'GET':
        manageGet($pdo);
        break;
    case 'POST':
        managePost($pdo, $data);
        break;
    case 'PUT':
        managePut($pdo, $data);
        break;
    case 'DELETE':
        manageDel($pdo, $data);
        break;
    default:
        echo json_encode(['message' => 'Error request method']);
        break;
}

function manageGet($pdo) {
    $sql = "SELECT * FROM users";
    $stmt = $pdo->prepare($sql);
    $stmt->execute();
    $items = $stmt->fetchAll(PDO::FETCH_ASSOC);
    http_response_code(200);
    echo json_encode($items);
}

function managePost($pdo, $input) {
    $sql = "INSERT INTO users (name, email) VALUES (:name, :email)";
    $stmt = $pdo->prepare($sql);
    $stmt->execute(['name' => $input['name'], 'email' => $input['email']]);
    echo json_encode(['message' => 'User created!']);
}

function managePut($pdo, $input) {
    $sql = "UPDATE users SET name = :name, email = :email WHERE id = :id";
    $stmt = $pdo->prepare($sql);
    $stmt->execute(['name' => $input['name'], 'email' => $input['email'], 'id' => $input['id']]);
    echo json_encode(['message' => 'User updated!']);
}

function manageDel($pdo, $input) {
    $sql = "DELETE FROM users WHERE id = :id";
    $stmt = $pdo->prepare($sql);
    $stmt->execute(['id' => $input['id']]);
    echo json_encode(['message' => 'User deleted!']);
}
?>