i want to get the timestamp of tomorrow at 12PM, i can do this using the line of code below
strtotime('tomorrow noon');
But the problem am having is that, when the current time is 00:00 at midnight, am getting the next day timestamp, i want it such when the time is 00:00 at midnight, it should still give the timestamp of noon of the new day not the next day.
You can do a simple ternary:
strtotime((date('H:i') == '00:00' ? '' : 'tomorrow ').'noon');
Or with a simple if case:
if (date('H:i') == '00:00') {
$noon = strtotime('noon');
} else {
$noon = strtotime('tomorrow noon');
}
I'm imagining you might like to display the current day at noon if it is not yet noon, otherwise show the time tomorrow at noon. If this is the case, the following might be helpful:
$noon = strtotime('now') < strtotime('noon')
? strtotime('noon')
: strtotime('tomorrow noon')
Related
lets assume that NOW is 2021-09-15 (DBDatetime format). I would like to add to that existing date -1 day and set time to be at 10:00 AM, so:
Initial date would be: 2021-09-15
Expired date would be: 2021-09-16 10:00 AM
The reason for that is I would like to get videos (on my newbie site) even after their airing time exired. So lets say expiring time is set to initial date and i want to have that till 21-09-16 10:00 AM is up.
Is that possible?
Yes, it's very easy with DateTime::modify.
$basisDate = '2021-09-15'; //or 'today' for the current day
$date = date_create($basisDate)->modify('+1 Day 10:00');
//test output
echo $date->format("Y-m-d H:i"); //2021-09-16 10:00
Another variant, not so tricky and easier to understand:
$date = date_create($basisDate)
->modify('+1 Day')
->setTime(10,0)
;
Here is a query that i am using to compare time in codeigniter
$present_time = date("h:i a");
$this->db->where('status!=', 'closed ');
$this->db->where('one_hour_break!=', ' ');
$this->db->where("(one_hour_break ='$present_time' or one_hour_break < '$present_time')");
$query = $this->db->get('student');
$final_time = $query->result();
if($final_time)
{
echo "true";
}
else
{
echo "false";
}
It is comparing the time properly if it is between 1 and 12 however it is not comparing time properly between the given time is between 12pm to 1pm and 12am to 1pm
e.g :
So if present time: 12:30 pm and one_hour_break: 1:30 pm, then one hour break should be greater than present time, and the result should say false, however it is saying true. Same goes with the time between 12pm to 1pm
Can anyone please tell how to manage this issue
There are a few ways to fix this, the best way is to go back and store the times in the database with "Y-m-d H:i" or something like it.
That way you can get a fixed timestamp of when, and not only time of day which is useless most of the times when you develop.
Then you use strtotime() http://php.net/manual/en/function.strtotime.php to convert the date in string format to a numeric value that can easily be compared.
So I have a database which stores a date-time value. I want to find out if the date is in the past - I don't care about the time part in this instance, just the date.
So I have the following code at the moment
//this is the current date
$today = strtotime(date("Y-m-d"));
//this is the date from the database
$gameDate = strtotime($rec[0])
if (strtotime($rec[0]) < $today) {
I feel like I am not doing this in the most accepted way, but my brain hurts from too much data and I was hoping someone could give me a pointer as to the 'correct'approach.
Assuming you only care about the Date part, and not the time part, as in 2016-01-01 14:00:00 and 2016-01-01 15:00:00 would be counted as the same day and not the past, you can use the following:
$dateFromDatabase = new DateTime('2016-05-23 17:00:00'); // $rec[0] in your case
$current = new DateTime();
$difference = $current->diff($dateFromDatabase);
if ($difference->format('%R') === '-') {
echo 'Date is in the past';
}
ideone can be found here
Any issues let me know.
The DateTime class in PHP (5.3+) works just great as long as the first day of the week in your country is Sunday. In the Netherlands the first day of the week is Monday and that just makes the class useless for building a calendar with week view and calculations.
I can't seem to find an answer on Stackoverflow or the rest of the Internet on how to have DateTime act as if the first day of the week is Monday.
I found this piece on Stackoverflow, but it doesn't fix all the ways you can get into trouble and it's not an elegant solution.
$dateTime = new DateTime('2012-05-14');
$monday = clone $dateTime->modify(('Sunday' == $dateTime->format('l')) ? 'Monday last week' : 'Monday this week');
Is there a way to change this or extent DateTime? Can't imagine it's not a setting as most of Europe starts their weeks on monday.
Added:
Posting the full calendar and functions code will not make things clearer. But here is one one line for example.
I often have to check what the first day of the week is or calculate from the first day of the week to a different date and time in that week. My code is getting full of these:
$startOfWeek = $date->modify(('Sunday' == $date->format('l')) ? 'Monday last week' : 'Monday this week')->modify('+3 hours')->format(DATETIME);
I also get an unwanted result trying to get the first full week of the month or year. As my $date object doesn't always contain the same date I have to keep checking it this way, making the code difficult to read. Having a lot more programming to do on this calendar I can't forsee where it's going to bug again.
EDIT There are some inconsistencies though. For some strange reason DateTime does get this next one right:
$test = new DateTime('2012-10-29'); // Monday
echo $test->modify('Sunday this week')->format('Y-m-d'); // 2012-11-04
// But...
$test = new DateTime('2012-11-04'); // Sunday
echo $test->modify('Monday this week')->format('Y-m-d'); // 2012-11-05 instead of 2012-10-29
But I think I can make the question clearer:
Can the DateTime() class be used with monday as the first day of the week. If not, can the class be extended to use monday as the first day of the week.
UPDATE:
Ok, I think I'm getting somewhere... I'm not a pro at coding classes..but this seems to work for the weeks. But it still needs rules for first day, second day... and also for the day name Sunday itself. I don't think this is foolproof. I would appreciate any help to fix it.
class EuroDateTime extends DateTime {
// Fields
private $weekModifiers = array (
'this week',
'next week',
'previous week',
'last week'
);
// Override "modify()"
public function modify($string) {
// Search pattern
$pattern = '/'.implode('|', $this->weekModifiers).'/';
// Change the modifier string if needed
if ( $this->format('N') == 7 ) { // It's Sunday
$matches = array();
if ( preg_match( $pattern, $string, $matches )) {
$string = str_replace($matches[0], '-7 days '.$matches[0], $string);
}
}
return parent::modify($string);
}
}
// This works
$test = new EuroDateTime('2012-11-04');
echo $test->modify('Monday this week')->format('Y-m-d');
// And I can still concatenate calls like the DateTime class was intended
echo $test->modify('Monday this week')->modify('+3 days')->format('Y-m-d');
I found this to work, yet there are some inconsistencies in PHP's DateTime class.
If the departing date is a sunday the previous monday is not considered the same week (fixed by this class). But departing from a monday, the next sunday is considered as the same week. If they fix that in the future this class will need some additions.
class EuroDateTime extends DateTime {
// Override "modify()"
public function modify($string) {
// Change the modifier string if needed
if ( $this->format('N') == 7 ) { // It's Sunday and we're calculating a day using relative weeks
$matches = array();
$pattern = '/this week|next week|previous week|last week/i';
if ( preg_match( $pattern, $string, $matches )) {
$string = str_replace($matches[0], '-7 days '.$matches[0], $string);
}
}
return parent::modify($string);
}
}
There's nothing to stop you manually modifying a date to get the "first" day of the week, depending on your definition of "first". For instance:
$firstDayOfWeek = 1; // Monday
$dateTime = new DateTime('2012-05-16'); // Wednesday
// calculate how many days to remove to get back to the "first" day
$difference = ($firstDayOfWeek - $dateTime->format('N'));
if ($difference > 0) { $difference -= 7; }
$dateTime->modify("$difference days");
var_dump($dateTime->format('r')); // "Mon, 14 May 2012 00:00:00 +0000"
Notice how the output changes as you vary $firstDayOfWeek; if it was changed to 4 above (Thursday), it would then consider Thu, 10 May 2012 as the "first" day.
Edit: this is a rather basic example. The correct way to do this is by using the user/system's locale to give you the "first" day, and compute from there. See this question for more information.
You can also get the start and the end of the week with setISODate, the last parameter is the ISO-daynumber in the week, monday is 1 and sunday 7
$firstday = new \DateTime();
$lastday = clone($firstday);
$firstday->setISODate($firstday->format("Y"),$firstday->format("W"),1);
$lastday->setISODate($firstday->format("Y"),$firstday->format("W"),7);
I too am confused about what the problem is, because DateTime does have a notion of the week starting from Monday: The N format gives you the days of the week counting from Monday to Sunday, with Monday being 1 and Sunday being 7. Moreover, the W format, the only way to get a week number, also starts the week on Monday. (I seem to remember that Dutch week numbers aren't exactly like ISO week numbers, but that's a different story). So what feature are you missing exactly?
Edit So the problem is (only?) that the relative datetime formats, such as "Monday this week" give the wrong result when the reference date is a Sunday. From the docs it sounds like DateTime just defers to strtotime, which is supposed to be locale-dependent. So if you have your locale set properly and this is not working, it sounds like a bug (for what that's worth).
The proper answer:
$week_start_day; // 0 - Sunday, 1 - Monday
$date_time_from = new DateTime('now');
$date_time_to = clone $date_time_from;
$this_week_first_day = $date_time_from->setISODate($date_time_from->format("Y"), $date_time_from->format("W"), $week_start_day);
$this_week_last_day = $date_time_to->setISODate($date_time_to->format("Y"), $date_time_to->format("W"), (6 + $week_start_day));
I have a simple situation where I have a user supplied week number X, and I need to find out that week's monday's date (e.g. 12 December). How would I achieve this? I know year and week.
Some code based mainly on previous proposals:
$predefinedYear = 2009;
$predefinedWeeks = 47;
// find first mоnday of the year
$firstMon = strtotime("mon jan {$predefinedYear}");
// calculate how much weeks to add
$weeksOffset = $predefinedWeeks - date('W', $firstMon);
// calculate searched monday
$searchedMon = strtotime("+{$weeksOffset} week " . date('Y-m-d', $firstMon));
An idea to get you started:
take first day of year
add 7 * X days
use strtodate, passing in "last Monday" and the date calculated above.
May need to add one day to the above.
Depending on the way you are calculating week numbers and the start of the week this may sometimes be out. (i.e. if the monday in the first week of the year was actually in the previous year!)
TEST THIS THOROUGHLY - but I've used a similar approach for similar calcualtions in the past.
This will solve the problem for you. It mainly derives from Mihail Dimitrov's answer, but simplifies and condenses this somewhat. It can be a one-line solution if you really want it to be.
function getMondaysDate($year, $week) {
if (!is_numeric($year) || !is_numeric($week)) {
return null;
// or throw Exception, etc.
}
$timestamp = strtotime("+$week weeks Monday January $year");
$prettyDate = date('d M Y');
return $prettyDate;
}
A couple of notes:
As above, strtotime("Monday January $year") will give you the timestamp of the first Monday of the year.
As above +X weeks will increment a specified date by that many weeks.
You can validate this by trying:
date('c',strtotime('Sunday Jan 2018'));
// "2018-01-07T00:00:00+11:00" (or whatever your timezone is)
date('c',strtotime('+1 weeks Sunday Jan 2018'));
// "2018-01-14T00:00:00+11:00" (or whatever your timezone is)
date('c',strtotime('+52 weeks Sunday Jan 2018'));
// "2019-01-06T00:00:00+11:00"
Due to reputation restriction i can't post multiple links
for details check
http://php.net/manual/en/function.date.php and http://php.net/manual/en/function.mktime.php
you can use something like this :
use mktime to get a timestamp of the week : $stamp = mktime(0,0,0,0,<7*x>,) {used something similar a few years back, so i'm not sure it works like this}
and then use $wDay = date('N',$stamp). You now have the day of the week, the timestamp of the monday should be
mktime(0,0,0,0,<7*x>-$wDay+1,) {the 'N' parameter returns 1 for monday, 6 for sunday}
hope this helps
//To calculate 12 th Monday from this Monday(2014-04-07)
$n_monday=12;
$cur_mon=strtotime("next Monday");
for($i=1;$i<=$n_monday;$i++){
echo date('Y-m-d', $cur_mon);
$cur_mon=strtotime(date('Y-m-d', strtotime("next Monday",$cur_mon)));
}
Out Put
2014-04-07
2014-04-14
2014-04-21
2014-04-28
2014-05-05
2014-05-12
2014-05-19
2014-05-26
2014-06-02
2014-06-09
2014-06-16
2014-06-23