Laravel中点号Cookie名称的设置与PHP接收行为解析

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Http\Response; // 引入Response类

class CookieController extends Controller
{
    /**
     * 设置一个包含点号的Cookie
     *
     * @return \Illuminate\Http\Response
     */
    public function setDotCookie()
    {
        $cookieName = '.cookie.withdots';
        $cookieValue = 'test-value';
        $expirationMinutes = 60; // Cookie有效期，单位分钟

        // 使用Laravel的response()->cookie()方法设置Cookie
        // 第一个参数是Cookie名称，第二个是值，第三个是有效期（分钟）
        return response('Hello World')->cookie(
            $cookieName,
            $cookieValue,
            $expirationMinutes
        );
    }
}

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Http; // 引入Http客户端

class CookieReceiverController extends Controller
{
    /**
     * 模拟发送一个包含点号的Cookie到另一个路由
     * 
     * 注意：这段代码通常用于测试或内部服务间通信，而非设置当前应用的响应Cookie。
     * 它模拟了客户端发送带有特定Cookie的请求。
     *
     * @return \Illuminate\Http\Response
     */
    public function sendCookieForTest()
    {
        // 假设您的Laravel应用运行在 http://localhost:8000
        $targetUrl = 'http://localhost:8000/receive-dot-cookie';

        // 使用Laravel的HTTP客户端发送一个包含点号Cookie的请求
        $response = Http::withHeaders([
            'Cookie' => '.cookie.withdots=test-value-sent'
        ])->get($targetUrl);

        return response("请求已发送，请检查目标路由的输出。");
    }

    /**
     * 接收并打印包含点号的Cookie
     *
     * @param \Illuminate\Http\Request $request
     * @return array
     */
    public function receiveDotCookie(Request $request)
    {
        // 打印所有接收到的Cookie，或特定名称的Cookie
        // 无论是通过request()->cookie()还是直接访问$_COOKIE，
        // 点号都会被转换为下划线。
        return [
            'received_cookies_via_request_helper' => $request->cookie(),
            'received_specific_cookie' => $request->cookie('_cookie_withdots'), // 注意这里是下划线
            'received_cookies_via_superglobal' => $_COOKIE,
        ];
    }
}

use App\Http\Controllers\CookieController;
use App\Http\Controllers\CookieReceiverController;

Route::get('/set-dot-cookie', [CookieController::class, 'setDotCookie']);
Route::get('/send-cookie-for-test', [CookieReceiverController::class, 'sendCookieForTest']);
Route::get('/receive-dot-cookie', [CookieReceiverController::class, 'receiveDotCookie']);

{
    "received_cookies_via_request_helper": {
        "_cookie_withdots": "test-value-sent"
    },
    "received_specific_cookie": "test-value-sent",
    "received_cookies_via_superglobal": {
        "_cookie_withdots": "test-value-sent"
    }
}