如何使用PHP和UniApp实现数据的定时任务

<?php

// 定义定时任务的执行时间
$cron = "0 2 * * *";

// 创建定时任务
$task = new CronTask($cron, function() {
    // 这里是定时任务的具体逻辑
    // 可以是发送邮件、生成数据报告、执行数据清理操作等
    // ...
});

// 添加定时任务到定时任务列表
CronManager::addTask($task);

// 启动定时任务
CronManager::start();

class CronTask {
    private $cron;
    private $callback;

    public function __construct($cron, $callback) {
        $this->cron = $cron;
        $this->callback = $callback;
    }

    public function getCron() {
        return $this->cron;
    }

    public function getCallback() {
        return $this->callback;
    }
}

class CronManager {
    private static $tasks = [];

    public static function addTask($task) {
        self::$tasks[] = $task;
    }

    public static function start() {
        while (true) {
            foreach (self::$tasks as $task) {
                if (self::isTimeToExecute($task->getCron())) {
                    $callback = $task->getCallback();
                    $callback();
                }
            }
            sleep(60); // 每隔60秒检查一次
        }
    }

    private static function isTimeToExecute($cron) {
        list($minute, $hour, $day, $month, $week, $year) = explode(" ", $cron);
        $currentMinute = date("i");
        $currentHour = date("H");
        $currentDay = date("d");
        $currentMonth = date("m");
        $currentWeek = date("w");
        $currentYear = date("Y");

        if ($minute != "*" && $currentMinute != $minute) {
            return false;
        }

        if ($hour != "*" && $currentHour != $hour) {
            return false;
        }

        if ($day != "*" && $currentDay != $day) {
            return false;
        }

        if ($month != "*" && $currentMonth != $month) {
            return false;
        }

        if ($week != "*" && $currentWeek != $week) {
            return false;
        }

        if ($year != "*" && $currentYear != $year) {
            return false;
        }

        return true;
    }
}

?>

// 定义定时任务的执行时间
const cron = "0 2 * * *";

// 创建定时任务
const task = {
    cron: cron,
    task: async () => {
        // 这里是定时任务的具体逻辑
        // 可以是发送邮件、生成数据报告、执行数据清理操作等
        // ...
    }
};

// 注册定时任务
uniCloud.addCrontab(task);