PHP获取上周、本周、上月、本月、本季度、上季度时间

echo date("Y-m-d",strtotime("now"));
echo "<br>";
echo date("Y-m-d",strtotime("-1 week Monday"));
echo "<br>";
echo date("Y-m-d",strtotime("-1 week Sunday"));
echo "<br>";
echo date("Y-m-d",strtotime("+0 week Monday"));
echo "<br>";
echo date("Y-m-d",strtotime("+0 week Sunday"));
echo "<br>";

echo "*********第几个月:";
echo date('n');
echo "<br>";
echo "*********本周周几:";
echo date("w");
echo "<br>";
echo "*********本月天数:";
echo date("t");
echo "<br>";
echo "*********";

echo '<br>上周起始时间:<br>';
echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),date("d")-date("w")+1-7,date("Y")));
echo "<br>";
echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("w")+7-7,date("Y")));
echo "<br>";
echo '<br>本周起始时间:<br>';
echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),date("d")-date("w")+1,date("Y")));
echo "<br>";
echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("w")+7,date("Y")));
echo "<br>";

//从第几周找出该周的开始日期和结束日期
$dayNumber = date('W') * 7;
$weekDayNumber = date("w", mktime(0, 0, 0, 1, $dayNumber, date("Y")));//当前周的第几天
$startNumber = $dayNumber - $weekDayNumber;
echo date("Y-m-d", mktime(0, 0, 0, 1, $startNumber + 1, date("Y")));//开始日期
echo "<br>";
echo date("Y-m-d", mktime(0, 0, 0, 1, $startNumber + 7, date("Y")));//结束日期
echo "<br>";

echo '<br>上月起始时间:<br>';
echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m")-1,1,date("Y")));
echo "<br>";
echo date("Y-m-d H:i:s",mktime(23,59,59,date("m") ,0,date("Y")));
echo '<br>本月起始时间:<br>';
echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),1,date("Y")));
echo "<br>";
echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("t"),date("Y")));
echo "<br>";

$season = ceil((date('n'))/3);//当月是第几季度
echo '<br>本季度起始时间:<br>';
echo date('Y-m-d H:i:s', mktime(0, 0, 0,$season*3-3+1,1,date('Y')));
echo "<br>";
echo date('Y-m-d H:i:s', mktime(23,59,59,$season*3,date('t',mktime(0, 0 , 0,$season*3,1,date("Y"))),date('Y')));
echo "<br>";

$season = ceil((date('n'))/3)-1;//上季度是第几季度
echo '<br>上季度起始时间:<br>';
echo date('Y-m-d H:i:s', mktime(0, 0, 0,$season*3-3+1,1,date('Y')));
echo "<br>";
echo date('Y-m-d H:i:s', mktime(23,59,59,$season*3,date('t',mktime(0, 0 , 0,$season*3,1,date("Y"))),date('Y')));

　　

/**
     * 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;
    }