Codeigniter - 创建 RESTful API

使用CodeIgniter框架可以轻松地创建RESTful API。RESTful API是一种基于HTTP协议的Web服务架构，它使用标准HTTP方法（GET、POST、PUT、DELETE）来实现数据的增删改查操作。本文将介绍如何使用CodeIgniter框架创建RESTful API，并通过一个案例代码来演示。

php
defined('BASEPATH') OR exit('No direct script access allowed');
require APPPATH . '/libraries/REST_Controller.php';
class Api extends REST_Controller {
    public function __construct() {
        parent::__construct();
        $this->load->database();
    }
    public function user_get($id = 0) {
        if (!empty($id)) {
            $data = $this->db->get_where("users", ['id' => $id])->row_array();
        } else {
            $data = $this->db->get("users")->result();
        }
        
        $this->response($data, REST_Controller::HTTP_OK);
    }
}

php
public function user_post() {
    $input = $this->input->post();
    $this->db->insert('users', $input);
    $this->response(['User created successfully.'], REST_Controller::HTTP_OK);
}

php
public function user_put($id) {
    $input = $this->put();
    $this->db->update('users', $input, array('id'=>$id));
    $this->response(['User updated successfully.'], REST_Controller::HTTP_OK);
}

php
public function user_delete($id) {
    $this->db->delete('users', array('id'=>$id));
    $this->response(['User deleted successfully.'], REST_Controller::HTTP_OK);
}