我按照教程here使用PHP创建RESTful API。
我在localhost上运行项目但是在尝试查看教程中建议的端点时我遇到以下错误（api / v1 / example）：
Notice: Undefined index: request in C:\wamp64\www\API\api.php on line 8
（注意：请参阅下面的api.php文件。）
这个请求索引应该在htaccess文件中设置，所以我认为这就是问题所在。 （我很抱歉，如果这很简单，但我试图找到自己没有运气。）你能帮忙吗？
在教程中我们创建：
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule api/v1/(.*)$ api/v1/api.php?request=$1 [QSA,NC,L]
</IfModule>
<?php
abstract class API
{
/**
* Property: method
* The HTTP method this request was made in, either GET, POST, PUT or DELETE
*/
protected $method = '';
/**
* Property: endpoint
* The Model requested in the URI. eg: /files
*/
protected $endpoint = '';
/**
* Property: verb
* An optional additional descriptor about the endpoint, used for things that can
* not be handled by the basic methods. eg: /files/process
*/
protected $verb = '';
/**
* Property: args
* Any additional URI components after the endpoint and verb have been removed, in our
* case, an integer ID for the resource. eg: /<endpoint>/<verb>/<arg0>/<arg1>
* or /<endpoint>/<arg0>
*/
protected $args = Array();
/**
* Property: file
* Stores the input of the PUT request
*/
protected $file = Null;
/**
* Constructor: __construct
* Allow for CORS, assemble and pre-process the data
*/
public function __construct($request) {
header("Access-Control-Allow-Orgin: *");
header("Access-Control-Allow-Methods: *");
header("Content-Type: application/json");
$this->args = explode('/', rtrim($request, '/'));
$this->endpoint = array_shift($this->args);
if (array_key_exists(0, $this->args) && !is_numeric($this->args[0])) {
$this->verb = array_shift($this->args);
}
$this->method = $_SERVER['REQUEST_METHOD'];
if ($this->method == 'POST' && array_key_exists('HTTP_X_HTTP_METHOD', $_SERVER)) {
if ($_SERVER['HTTP_X_HTTP_METHOD'] == 'DELETE') {
$this->method = 'DELETE';
} else if ($_SERVER['HTTP_X_HTTP_METHOD'] == 'PUT') {
$this->method = 'PUT';
} else {
throw new Exception("Unexpected Header");
}
}
switch($this->method) {
case 'DELETE':
case 'POST':
$this->request = $this->_cleanInputs($_POST);
break;
case 'GET':
$this->request = $this->_cleanInputs($_GET);
break;
case 'PUT':
$this->request = $this->_cleanInputs($_GET);
$this->file = file_get_contents("php://input");
break;
default:
$this->_response('Invalid Method', 405);
break;
}
}
public function processAPI() {
if (method_exists($this, $this->endpoint)) {
return $this->_response($this->{$this->endpoint}($this->args));
}
return $this->_response("No Endpoint: $this->endpoint", 404);
}
private function _response($data, $status = 200) {
header("HTTP/1.1 " . $status . " " . $this->_requestStatus($status));
return json_encode($data);
}
private function _cleanInputs($data) {
$clean_input = Array();
if (is_array($data)) {
foreach ($data as $k => $v) {
$clean_input[$k] = $this->_cleanInputs($v);
}
} else {
$clean_input = trim(strip_tags($data));
}
return $clean_input;
}
private function _requestStatus($code) {
$status = array(
200 => 'OK',
404 => 'Not Found',
405 => 'Method Not Allowed',
500 => 'Internal Server Error',
);
return ($status[$code])?$status[$code]:$status[500];
}
}
?>
<?php
require_once 'API.class.php';
class MyAPI extends API
{
protected $FacebookUser;
public function __construct($request, $origin) {
parent::__construct($request);
//I removed the User and API key code here until they are set up properly
}
/**
* Example of an Endpoint
*/
protected function example() {
if ($this->method == 'GET') {
return "Endpoint is working";
} else {
return "Only accepts GET requests";
}
}
}
?>
<?php
require_once 'MyAPI.class.php';
// Requests from the same server don't have a HTTP_ORIGIN header
if (!array_key_exists('HTTP_ORIGIN', $_SERVER)) {
$_SERVER['HTTP_ORIGIN'] = $_SERVER['SERVER_NAME'];
}
try {
//the following $_REQUEST['request'] variable is not set.
$API = new MyAPI($_REQUEST['request'], $_SERVER['HTTP_ORIGIN']);
echo $API->processAPI();
} catch (Exception $e) {
echo json_encode(Array('error' => $e->getMessage()));
}
?>
答案 0 :(得分：1)
$_REQUEST是客户端发送的请求变量数组。密钥request不保证存在于此数组中。尝试使用调试器或var_dump来显示数组的内容。
也许如果您根据发送请求更新您的问题，有人可以为您提供更多指导。
答案 1 :(得分：1)
读取你的.htaccess文件，你需要一个更像这样的层次结构：
API
├── api
│ └── v1
│ └── api.php
└── .htaccess
API当前是文档根目录的子文件夹（将来您可能会将API作为文档根目录或相应地移动文件）。
API/.htaccess的内容：
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule api/v1/(.*)$ api/v1/api.php?request=$1 [QSA,NC,L]
API/api/v1/api.php的内容（检查重写是否有效）：
<?php
var_dump($_REQUEST);
然后请求：
example.com/API/api/v1/foo
应该重写到你的api.php文件（通过重写规则），api.php应该输出：
array(1) { ["request"]=> string(3) "foo" }