<?php
/**
 * Created by PhpStorm.
 * User: Bear
 * Date: 2019/12/12
 * Time: 下午3:37
 */

namespace app;

class Limit
{
    public static function checkLimit()
    {
        $uri = $_SERVER['REQUEST_URI'] ?? '';
        if (preg_match('/\\/api\\/wechat\\/mpapi\\/appid\\/(\w+)/', $uri, $match)) {
            $appid = $match[1];
            $cachefile = sys_get_temp_dir() . '/TPL_CALLBACK_' . $appid;
            if (file_exists($cachefile)) {
                $content = trim(file_get_contents($cachefile));
                if (time() - (int)$content < 10) {
                    echo json_encode(['err' => 1, 'msg' => 'appid limited']);
                    exit;
                } else {
                    @unlink($cachefile);
                }
            }
        }
    }
}

Limit::checkLimit();