PHP calculates how many days are left until your birthday

declare @t table(id int identity(1,1), date of birth datetime).

insert into @t

select '1985-09-3'

union all select '1977-09-04'

union all select '1978-11-25'

union all select '1979-11-26'

union all select '1987-11-27'

union all select '1999-11-28'

union all select '1999-11-29'

union all select '1999-11-30'

select * from(

select *, number of days = datediff(day, getdate(), dateadd(year, year(getdate()) year(date of birth), date of birth)).

from @t) a

ID Date of Birth Number of days.

8 rows affected).

Get the timestamp of the birthday first, then subtract time().

Countdown to birthday.

birthday = "2017-12-29";

date_default_timezone_set("prc");

Today's timestamp.

today = time();

echo "Today is".date("y-m-d",$today)."

Birthday timestamp.

bstamp = strtotime($birthday);

How many days countdown.

rev = ceil(($bstamp-$today)/(24*3600));

echo "It's your birthday just yet".$rev."days";

The idea is to find the difference between the seconds of the two times, and then convert the result

echo calctime('2018-08-20', '2018-08-30');

function calctime($fromtime, $totime)

This can only give you an idea.

PHP has a function that directly outputs the timestamp strtotime( of a certain day'2018-08-30')；。

Use this timestamp to subtract the current timestamp, and then use the result of subtraction 3600 24 to calculate the number of days Generally, it is necessary to take the downward movement (less than 1 day is counted as 0 days).

Wouldn't it be nice to add up the number of days in each month, let's talk about the specific needs, like getting the number of days in March 2018 is as follows:

Get the number of days in March 2018.

day = date('d', strtotime('2018-03'));

: The calculation methods are not limited to those described below, but some of the more conventional methods:

The php time and date function strtotime above has turned the string date into a timestamp, so that you just subtract the two values, and then turn the seconds into days, the comparison is simple, as follows:

days=round(($enddate-$startdate)/3600/24) ;

Here's another way to do it:

The above is the size of the two dates, and the following is the program for judging birthdays**, and the $n obtained is the number of days apart from the birthday.

birthday=birthday;

birthday = preg_replace(‘/d+/’, date(‘y’),birthday, 1);

d = 60*60*24;

n= floor((strtotime($birthday)-time())/$d);$n=$n+1;

Also, if you compare it to the current time, you can use the time() function to get the current timestamp.

In the second case, there is a database, which is relatively easy! If it's mssql, you can use triggers! Use the function datediff() that calculates the date difference!

If it's MySQL, then use the timestamp values of the two date fields and calculate the difference in days to get the difference. The method is very similar to the ** above.

$date1 = strtotime('2016-12-10');Convert dates to timestamps.

date2 = time();Take the timestamp of the current time.

nowtime=strftime("%yy-%m-%d-day",$date2);Format the output date.

days=round(($date1-$date2)/3600/24);Round.

echo "Today is".$nowtime."";

echo "

distance".strftime("%yy-%m-%d-day",$date1)."And there is".$days."days";

Hope it can be adopted, thank you.

Convert two dates to timestamps: the larger one is subtracted from the smaller one and divided by the number of seconds in a day to get the date distance.

strtotime date conversion timestamp.

Write the program yourself, it's clear.