huahuibao/common/components/dateUtil.php

<?php

namespace common\components;

use Yii;

class dateUtil
{
	
	//获取日期 shish 2019.9.16
	public static function getDate($type = 0)
	{
		switch ($type) {
			case 1:
				//最近7天
				$start = date('Ymd', strtotime("-7 days"));
				$end = date("Ymd");
				break;
			case 2:
				//最近30天
				$start = date('Ymd', strtotime("-30 days"));
				$end = date("Ymd");
				break;
			case 3:
				//本月
				$start = date("Ym") . "01";
				$end = date("Ymd");
				break;
			case 4:
				//上个月
				$start = date("Ymd", mktime(0, 0, 0, date("m") - 1, 1, date("Y")));
				$end = date("Ymd", mktime(23, 59, 59, date("m"), 0, date("Y")));
				break;
		}
		return [$start, $end];
	}
	
	//取月份 $type=30以上的表示取月份 shish 2019.12.31
	public static function getMonth($type = 30)
	{
		$end = date("Ym");
		switch ($type) {
			case 30:
				//最近3个月
				$start = self::getStartMonth(3);
				break;
			case 31:
				//最近半年
				$start = self::getStartMonth(6);
				break;
			case 32:
				//最近一年
				$start = self::getStartMonth(12);
				break;
			case 33:
				//今年
				$start = date("Y01");
				break;
			default:
				$start = self::getStartMonth(3);
		}
		return [$start, $end];
	}

	//获取开始的月份 shish 2019.12.31
	public static function getStartMonth($num)
	{
		$base = date('Ym01');
		for ($i = 1; $i < $num; $i++) {
			$start = date('Ym', strtotime('-1 month', strtotime($base)));
			$base = $start . '01';
		}
		return $start;
	}

}