分享一些时间处理函数

<?php

class Time

{

    /**

     * 返回今日开始和结束的时间戳

     *

     * @return array

     */

    public static function today()

    {

        return [

            mktime(0, 0, 0, date('m'), date('d'), date('Y')),

            mktime(23, 59, 59, date('m'), date('d'), date('Y'))

        ];

    }

    /**

     * 返回昨日开始和结束的时间戳

     *

     * @return array

     */

    public static function yesterday()

    {

        $yesterday = date('d') - 1;

        return [

            mktime(0, 0, 0, date('m'), $yesterday, date('Y')),

            mktime(23, 59, 59, date('m'), $yesterday, date('Y'))

        ];

    }

    /**

     * 返回本周开始和结束的时间戳

     *

     * @return array

     */

    public static function week()

    {

        $timestamp = time();

        return [

            strtotime(date('Y-m-d', strtotime("this week Monday", $timestamp))),

            strtotime(date('Y-m-d', strtotime("this week Sunday", $timestamp))) + 24 * 3600 - 1

        ];

    }

    /**

     * 返回上周开始和结束的时间戳

     *

     * @return array

     */

    public static function lastWeek()

    {

        $timestamp = time();

        return [

            strtotime(date('Y-m-d', strtotime("last week Monday", $timestamp))),

            strtotime(date('Y-m-d', strtotime("last week Sunday", $timestamp))) + 24 * 3600 - 1

        ];

    }

    /**

     * 返回本月开始和结束的时间戳

     *

     * @return array

     */

    public static function month($everyDay = false)

    {

        return [

            mktime(0, 0, 0, date('m'), 1, date('Y')),

            mktime(23, 59, 59, date('m'), date('t'), date('Y'))

        ];

    }

    /**

     * 返回上个月开始和结束的时间戳

     *

     * @return array

     */

    public static function lastMonth()

    {

        $begin = mktime(0, 0, 0, date('m') - 1, 1, date('Y'));

        $end = mktime(23, 59, 59, date('m') - 1, date('t', $begin), date('Y'));

        return [$begin, $end];

    }

    /**

     * 返回今年开始和结束的时间戳

     *

     * @return array

     */

    public static function year()

    {

        return [

            mktime(0, 0, 0, 1, 1, date('Y')),

            mktime(23, 59, 59, 12, 31, date('Y'))

        ];

    }

    /**

     * 返回去年开始和结束的时间戳

     *

     * @return array

     */

    public static function lastYear()

    {

        $year = date('Y') - 1;

        return [

            mktime(0, 0, 0, 1, 1, $year),

            mktime(23, 59, 59, 12, 31, $year)

        ];

    }

    public static function dayOf()

    {

    }

    /**

     * 获取几天前零点到现在/昨日结束的时间戳

     *

     * @param int $day 天数

     * @param bool $now 返回现在或者昨天结束时间戳

     * @return array

     */

    public static function dayToNow($day = 1, $now = true)

    {

        $end = time();

        if (!$now) {

            list($foo, $end) = self::yesterday();

        }

        return [

            mktime(0, 0, 0, date('m'), date('d') - $day, date('Y')),

            $end

        ];

    }

    /**

     * 返回几天前的时间戳

     *

     * @param int $day

     * @return int

     */

    public static function daysAgo($day = 1)

    {

        $nowTime = time();

        return $nowTime - self::daysToSecond($day);

    }

    /**

     * 返回几天后的时间戳

     *

     * @param int $day

     * @return int

     */

    public static function daysAfter($day = 1)

    {

        $nowTime = time();

        return $nowTime + self::daysToSecond($day);

    }

    /**

     * 天数转换成秒数

     *

     * @param int $day

     * @return int

     */

    public static function daysToSecond($day = 1)

    {

        return $day * 86400;

    }

    /**

     * 周数转换成秒数

     *

     * @param int $week

     * @return int

     */

    public static function weekToSecond($week = 1)

    {

        return self::daysToSecond() * 7 * $week;

    }

    private static function startTimeToEndTime()

    {

    }

}

?>