在PHP中获取特定的日期/时间值

在PHP中获取特定的日期/时间值

问题描述:

I have a cron task that logs a value in my database every 15 minutes so my database rows look something like this:

1, 100, 1311312600
1, 100, 1311313200
1, 90, 1311313800

etc.

The third field is a time() value.

Lets say the current time is 1:00PM on 07/22/2011. I want to see all of yesterdays values, so I need the following times for my SQL query.

07/22/2011 00:00:00
07/21/2011 00:00:00

How do I generate those values from the current time? Keep getting tripped up!

我有一个cron任务,每隔15分钟在我的数据库中记录一次值,所以我的数据库行看起来像这样: p>

  1,100,1311312600 
1,100,1311313200 
1,90,1311313800 
  code>  pre> 
 
 

等。 p>

第三个字段是time()值。 p>

假设当前时间是2011年7月22日下午1:00。 我希望看到所有昨天的值,所以我需要以下时间进行SQL查询。 p>

  07/22/2011 00:00:00 
07 / 21/2011  00:00:00 
  code>  pre> 
 
 

如何从当前时间生成这些值? 继续绊倒! p> div>

$yesterday_begin = strtotime('-1 day 12:00:00 AM');
$yesterday_end   = strtotime('-1 day 11:59:59 PM');

Then

SELECT * FROM ... WHERE time_stamp BETWEEN $yesterday_begin AND $yesterday_end

$start = mktime(0, 0, 0, date('n') - 1, $day, date('Y');
$end = mktime(0, 0, 0, date('n'), $day, date('Y');

select *
from logtable
where DATE(FROM_UNIXTIME(timestampfield)) = '2011/07/21'