时间工具

<?php
/*** User: yuzhao* CreateTime: 2018/10/30 上午11:58* Description: 时间工具类*/class TimeTool {/*** User: yuzhao* CreateTime: 2018/11/14 上午11:20* @var* Description: 统一时间*/private $time=0;/*** User: yuzhao* CreateTime: 2018/11/14 上午11:25* @var* Description:  当前对象*/private static $myself;/*** TimeTool constructor.*/public function __construct($time){$this->time = $time;}/*** User: yuzhao* CreateTime: 2018/11/14 上午11:20* Description: 单例模式返回当前对象*/public static function instance($time=null) {if (self::$myself === null || (self::$myself->time !== $time && $time!==null)) {self::$myself = new TimeTool($time);}return self::$myself;}/*** User: yuzhao* CreateTime: 2018/10/30 下午2:42* @return array* Description: 获取时间基本信息*/public function getTimeBaseInfo() {return array(// 当前时间'now_time'  => $this->time,'ymd'       => date('Ymd', $this->time),'today_week'=> $this->getTodayWeek());}/*** User: yuzhao* CreateTime: 2018/11/14 上午10:31* @param $day* @param string $format* @return mixed* Description: 获取本周日期*/public function getNowWeekDay($day, $format = "Ymd") {$day--;$week = date('w', $this->time);//星期日排到末位if(empty($week)){$week=7;}return date($format,strtotime( '+' . $day+1-$week .' days',$this->time));}/*** User: yuzhao* CreateTime: 2018/11/7 上午10:51* @return false|int* Description: 获取上一周的某一天*/public function getLastWeekDay($day,$format='Ymd') {$day--;$week = date('w', $this->time);//星期日排到末位if(empty($week)){$week=7;}return date($format,strtotime( '+' . $day+1-$week-7 .' days',$this->time));}/*** User: yuzhao* CreateTime: 2018/11/13 下午11:37* Description: 后去今天是星期几*/public function getTodayWeek() {return date("w", $this->time);}/*** User: yuzhao* CreateTime: 2018/11/7 上午10:52* Description: 获取今天的开始时间*/public function getTodayStart() {return mktime(0,0,0,date('m'),date('d'),date('Y'));}/*** User: yuzhao* CreateTime: 2018/11/7 上午10:52* Description: 获取今天的结束时间*/public static function getTodayEnd() {return mktime(0,0,0,date('m'),date('d')+1,date('Y'))-1;}/*** User: yuzhao* CreateTime: 2018/11/7 上午10:55* @return false|string* Description: 获取任务名*/public static function getNowWeekStartTime() {return date('Ymd', (time() - ((date('w') == 0 ? 7 : date('w')) - 1) * 24 * 3600));}/*** User: yuzhao* CreateTime: 2018/11/14 上午11:44* @param $day1* @param $day2* @return float|int* Description: 获取两个日期相差的天数*/public static function diffBetweenTwoDays ($day1, $day2) {$second1 = strtotime($day1);$second2 = strtotime($day2);if ($second1 < $second2) {$tmp = $second2;$second2 = $second1;$second1 = $tmp;}return ($second1 - $second2) / 86400;}
}