在es query时，有时我们想查询当天零时起到现在的数据，表达方式如下：
{
    "range": {
        "timestamp": {
            "gte": "now/d",      //表示当天的开始
            "lt": "now"
        }
    }
}

 

一、取得当天零点

header("Content-type:text/html;charset=utf-8");
//设置北京时间为默认时区
date_default_timezone_set('PRC');
//输出当前时间
echo date("Y-m-d H:i:s",time()); //2016-08-11 10:30:32
//获得当日凌晨的时间戳
$today = strtotime(date("Y-m-d"),time());
echo '<br>';
echo $today; //1470844800
echo '<br>';
//验证当日凌晨的时间戳是否正确
echo date("Y-m-d H:i:s",$today); //2016-08-11 00:00:00
echo '<br>';
//当天的24点时间戳
$end = $today+60*60*24;
//验证当天的24点时间戳是否正确
echo date("Y-m-d H:i:s", $end); //2016-08-12 00:00:00
echo '<br>';
//获得指定时间的零点的时间戳
$time = strtotime('2014-06-06');
echo '<br>';
echo $time; //1401984000
echo '<br>';
//验证是否是指定时间的时间戳
echo date("Y-m-d H:i:s",$time); //2014-06-06 00:00:00

方法二、

$todayStart= date('Y-m-d 00:00:00', time()); //2019-01-17 00:00:00
$todayEnd= date('Y-m-d 23:59:59', time()); //2019-01-17 23:59:59

方法三：

 //当天开始时间
 $start_time=strtotime(date("Y-m-d",time()));
 //当天结束之间
 $end_time=$start_time+60*60*24;
 echo  $start_time;      1541001600
 echo $end_time;        1541088000
 $start_time=date("Y-m-d H:i:s",$start_time);       
 $end_time=date("Y-m-d H:i:s",$end_time);           
 echo  $start_time;      1541001600        //2018-11-01 00:00:00
 echo $end_time;         1541088000       //2018-11-02 00:00:00


PHP获取昨天0点到23点方法

$ytime = strtotime(date("Y-m-d",strtotime("-1 day")));//昨天开始时间戳
$yetime = $ytime+24 * 60 * 60-1;//昨天结束时间戳
var_dump($yetime);die;

 

/**

* 获得当天零时零分零秒

* @return

*/

private Date initDateByDay(){

Calendar calendar = Calendar.getInstance();

calendar.setTime(new Date());

calendar.set(Calendar.HOUR, 0);

calendar.set(Calendar.MINUTE, 0);

calendar.set(Calendar.SECOND, 0);

return calendar.getTime();

}
/**
 * 获得当天的年份
 * @return
 */
private Integer getYear(){
    Calendar calendar = Calendar.getInstance();
   return calendar.get(Calendar.YEAR);
}

/**
 * 获得当天的月份
 * @return
 */
private Integer getMonth(){
    Calendar calendar = Calendar.getInstance();
    return calendar.get(Calendar.MONTH )+1;
}

/**

* 获取指定天数后的时间对象

* @param date

* @param day

* @return

*/

private Date addDateIsDay (Date date,Integer day){
    Calendar calendar = Calendar.getInstance();
    calendar .setTime(date);
    calendar .add(Calendar.DAY_OF_MONTH, day);// 今天+day天
    return calendar.getTime();
}

<?php
$todayStart= date('Y-m-d 00:00:00', time()); //2019-01-17 00:00:00
$todayEnd= date('Y-m-d 23:59:59', time()); //2019-01-17 23:59:59