Syntax: Object oriented style:Summary: in this tutorial, you’ll learn how to work with the date and time in an object-oriented way. 3. Let's see some practical examples of the date() function now. See DateInterval::format () . Welcome back! If you're the original bug submitter. DateTime::createFromFormat — Parses a time string according to a specified format. For example, if a record is created now, a new one can only be created in say 10 seconds. The class can also calculate the time difference between two dates, as well add or subtract time to a given. This object does not have sub function. 3. Calculate total seconds in PHP DateInterval. The W3Schools online code editor allows you to edit code and view the result in your browserA Computer Science portal for geeks. strtotime assumes the time string is in the time zone specified by php's current date_default_timezone_get. Example #1 DateTimeImmutable::add/sub add intervals which cover elapsed time Adding PT24H over a DST transition will appear to add 23/25 hours (for most timezones). I guessed it meant period and I was searching php. See Also. Return Value: This function returns the. 3. Weitere Informationen finden Sie in der DateInterval-Dokumentation. How to add minutes to the time part of datetime. The format starts with the letter P, for "period. Calculate business days. time (): int. I'm sure I could come up with a solution by brute force if necessary, but I'm. In the case above, 12 x 3600 = 43200. see the following code:Collectives™ on Stack Overflow. I've read the documentation and don't quite understand how it works. days. It's relatively compact. Learn more about Collectives@Greg - Yes, I make the assumption that most developers should be using at least PHP 5. Jan 29, 2024 00:00:00 Feb 01, 2024 01:00:00 Feb 04, 2024 02:00:00 Feb 07, 2024 03:00:00 Feb. However, the days property of the DateInterval object seems to be broken in the current PHP5. A PHP dateinterval represents a date interval as a storage structure for time which is accompanied by various components like objects and functions for implementation. There are many other special characters to specify the output for the date() function. interval 1: 03:05 interval 2: 05:00 Total interval : 08:05 Instead you need to create a new DateTime object, then use the add function to add the intervals and finally display the difference to the reference point:PHP Collective Join the discussion This question is in a collective: a subcommunity defined by tags with relevant content and experts. DateTime::__construct — Returns new DateTime object. The interval can deduct from the given date and time. The DateInterval enumeration defines constants used with date-related functions to identify how date intervals are determined and formatted. DateIntervalType Field. PHP date interval - wrong month difference. And converting months to seconds is complete nonsense. DateTime handles time-of-day, not time intervals. 6. , or. PHP DateInterval select days of week every x weeks. This makes the date 2010-02-31. Example: This example illustrates the use of the date_diff () function to calculate the difference between the 2 dates. Like DateTimeImmutable::add() but works with DateTime . expects to be given a string containing a US English date format and will try to parse that format into a Unix timestamp (the number of seconds since January 1 1970 00:00:00 UTC), relative to the timestamp given in now, or the current time if now is not supplied. Hot Network Questions A question of random points in a square and probability of intersection of their line segmentsFloating point number stores fraction value. Method compare makes a value comparison. PHP - total number of days is not an integer. Since OP said nothing about DST, i presume the last. I also attempted to do it in a way which would fail to preserve number. days: If the DateInterval object was created by DateTime::diff(), then this is the total number of days between the start and end dates. PHP DateInterval not returning last day of the month. which now is 24 hour and represents 1 day. PHP -. You can't use date to substract or add days (hours, minutes etc. [2012-05-05 20:45 UTC] php at arjanonline dot net Description: ----- When I create a DateTime object from a (any) timestamp and then add a DateInterval object to the DateTime object, the time in the DateInterval object is added and one additional hour is also added. Check CarbonInterval chapter for more information. Just to expand on previous answers, a function to do this could work like this (changing the time and interval formats however you like them according to this for function. So, one way to do this is to substract the time from Carbon first and then calculate diff. Three refreshes right now at 9:51pm give the following results: 2013-03-26 09:09:03, 2013-03-26 09:17:03, 2013-03-26 09:30:03 The best course of action is using PHP's DateTime (and DateInterval) objects. Dynamically update date for days PHP. 3's DateInterval supports this. This should be. If the duration contains time elements, that portion of the specification is preceded by the letter T. does not have F nor f similarly to DateInterval::format that supports split seconds. [PDF] A Comprehensive Guide to REDCap Project approvals will generally be granted within 1–2 business days (24–48 hours) of the request. What I'd like to do is only show the time formatted in x hours ago if the time is within the last 24 hours, otherwise just show a normal datetime. Get the current date and time. DateTime — The DateTime class. PHP DateInterval: Diff between same date in two different months is not one month 3 Calculate months between two dates using DateInterval without wrapping within a yearMain PHP Function Online page. php; Share. The format of the outputted date string. I've read the documentation and don't quite understand how it works. js, Node. With PHP, I want to increment the date by one month, and I want the year to be automatically incremented, if necessary (i. Here we are using DateTime and DateInterval for getting desired output. This method will handle intervals created via the DateInterval contructor more or less correctly,. Table of Contents. Previous SQL Server Functions Next . @iainn Thanks for your help, I was focusing too much on one thing and boom, doing it wrong where I was thinking to be right. I am currently working at a system for a manufacturing company that monitors a daily output data, but the company follows a 24hours production duration which the date ends at 6:00 AM, but the standard PHP date/time change after 12:00 midnight,is it possible to change the PHP date/timestamp to change the current date after 6am?. That means that it's off by an hour at most, but except for that it should be correct. PHP DateInterval does not applied on DateTime object. Value)) / 60D) - txtBreakHrs. Retorna o objeto DateTime modificado para encadeamento de métodos. The method is aware of DST changeovers, and hence can return an interval of 24 hours and 30 minutes, as per one of the examples. 0) Examples: Z or +02:00: T: Timezone abbreviation, if known; otherwise the GMT offset. This will make more sense mathematically, which is what I recommend. 在 PHP 中使用 time () 获取昨天的日期. I have this formula to get my fix hours : FixEncodedHours = Decimal. Follow. 2. DateTime is an awesome feature in PHP. Valeurs de retour. DateTimeImmutable::add() - Returns a new object, with added amount of days, months, years, hours, minutes and seconds DateTimeImmutable::diff() - Returns the difference between two DateTime objects DateTimeImmutable::modify() - Creates a new object with modified timestamp ＋add a noteWe have function which creates a DateTime object from a serialised date string in the session and compares it to now using the DateTime diff function. For example, 6 days, or 45 minutes. 1. Follow edited Jul 28 at 15:50. The diff function you call will return different timestamp. The Period Designators are below. Today we’re going to dissect the PHP DateInterval class, a power tool for dealing with dates in a web app. 2,459 1 1 gold badge 15 15 silver badges 26 26 bronze badges 1 Thanks, in my case it was definitely necessary to cut off seconds, as I do some more time based calculations and rely on proper DateInterval objects. The following happens internally: +1 month increases the month number (originally 1) by one. I tried it myself and it isn't possible with DatePeriod alone, but I think that makes sense: It just reflects the periods, that usually doesn't have any specific order and therefore cannot get reordered (it can be treated as a set). So: $date =. " [2012-02-25 12:20 UTC] map at wafriv dot de I've got the same problem with PHP 5. 3 版本中使用这种方法。Also make sure your php version (PHP 5 >= 5. While I appreciate the link to PHP Documentation, it would be nice to describe what the parameters in your example do. DateTime::diff: Get the difference and use that to determine which is more ancient. Some above the actual time some below it. 0. A se vedea și. Also note that I didnt say your question was invalid or inaccurate (since you stress that). This function accepts an interval and a format string as parameters and, formats the given interval in the specified format. The date_diff() is an inbuilt function in PHP which is used to calculate the difference between two dates. This is expected because it is not possible to overflow values like "32 days" which could be interpreted as anything from "1 month and 4 days" to "1 month and 1 day". This process is not always reversible. Return time difference as integer. I don't have the time to look into this at the moment but I hope this points you in the right direction. PHP DateInterval not returning last day of the month. If you want. 0, PHP 7, PHP 8). Data type for storing hour interval. $string = '1/1/2016 11. The Overflow BlogCurrently my code is adding a week, but I'm using Days instead of Weeks. Minutes to add will just be a number between 0 and 59 So, PHP should add that with each iteration. ' in the instance() method, because PHP DateInterval generate an immutable days property (don't know why) when created from diff(). Date/Time Functions in PHP 5. Follow. @niceman Nope, date_diff doesn't work (date_diff() expects parameter 1 to be DateTimeInterface, object given) and date_create() doesnt works too (not accepting normal nor formated dates of type DateInterval)(PHP 5 >= 5. 8 on Windows. 4 only adds 3 days and 1 hour with each iteration while ignoring the 2 weeks period. Parameters. The DateInterval class can be used to store a certain amount of time, such as years, months, hours, etc. Below programs illustrate the date. . 3600 seconds earlier is that timestamp minus one hour. I've tried strtodate, the date function, but nothing seems to be working. Si el objeto DateInterval se creó con DateTime::diff(), entonces es el número total de días entre las fechas de inicio y fin. (available as of PHP 8. 0. Have a look at this sample and. We also provide diffAsCarbonInterval() act like diff() but returns a CarbonInterval instance. My goal was to create a list of times between like 10:00 and 14:00 with 15 minute intervals. days * 24 * 60 * 60 ); The calculation in the last step does not take into account the hours, minutes and seconds in the date difference (as they're not included in the %a format). The behaviour with PT1H is now correct:. Find centralized, trusted content and collaborate around the technologies you use most. strtotime() - Parse about any English textual datetime description into a Unix timestamp DateTimeImmutable::modify() - Creates a new object with modified timestamp DateTime::add() - Modifies a DateTime object, with added amount of days, months, years, hours, minutes and seconds DateTime::sub() - Subtracts an amount of days, months,. This P stands for the period. H is the hour designator that follows the value for the number of hours. NET data type is System. 2 the DateTime () class were introduced. This process is not always reversible. 2. 使用 PHP 5. 2 branch of PHP ceased to be supported in August last year. 1. PHP: DateInterval # Adds 7 days to the project launch. A variable assign a value 1. PT5M45S — 5 Minutes 45 seconds. One of the key-points of PHP 5 OOP that is often. Improve this answer. PHP で日付を追加するための. I'd like to be able to take difference between two dates and determine the time in decimal format to be able to calculate hourly rate. Here's an example of the datetime strings I am working with: Tue May 15 10:14:30 +0000 2012. 10. Regarding PHP 5. It can take the current date or a given date in a certain format and parse it to get the date components such as the year, month, day, hour, minute and second. my code is function my_last_login( ) { return 'j F Y H:i'; } it prints 21 october 2015 15:36 i want 21 october 2015 17. 在 PHP 中使用 DateInterval 获取昨天的日期. The date_sub() is an inbuilt function in PHP which is used to subtract some days, months, years, hours, minutes, and seconds from given date. DateTime::sub () - Subtracts an amount of days, months,. 6, the fraction is truncated. Array ( [14] => Array // week ( [1] => 2013-04-01 [2] => 2013-04-02 [3] => 2013-04-03. Then, when converting from seconds, it would divide in that order, each time taking the modulo of the previous operation, until only <60. Return Value: It returns a DateTime object after subtracting interval. Return Value: Returns a DateTime object on success. Return Value : This function returns a DateTime. 0. . 3. In that regard, what PHP 8. NOTE: This approach does not work for intervals less than a day with time-zones that recognize DST, due to a known issue with dates and the DST hour changes. The equivalent . When getting the difference between two DateTime objects with fractions of seconds, DateTime::diff() works under PHP 7. 1. e it stores either a fixed amount of time (in years, months, days, hours etc) or a relative time string in the format that DateTime’s constructor supports. Distribute a month in weeks with start and end dates array. Real mails from my inbox. For example, the following representations are valid ISO 8601 intervals, but will cause the DateInterval constructor to throw exceptions: P0. This is expected because it is not possible to overflow values like "32 days" which could be interpreted as anything from "1 month and 4 days" to "1 month and 1 day". 0. ,You can also define a single string pattern if you want, using [] to delimiter the optional sections:,The first is harder, but maybe there is a trick with one of the many string-to-date converters in PHP?1 hour - 3600; 1 day - 86400 (24 hours) 1 week - 604800 (7 days) 1 month - 2419200 (4 weeks) Share. P3Y, P6M, P4D, P3Y6M4D, and all time-only interval formats. A value containing a date and time value to which a specified time interval has been added. The second month (February) only has 28 days in 2010, so PHP auto-corrects this by just continuing to count days from February 1st. 0, PHP 7, PHP 8) DateTime::sub-- date_sub — Subtracts an amount of days, months, years, hours, minutes and seconds from a DateTime object Description. date_diff produces a DateInterval type, which can't be used as a string - that's why you need to call ->format on it when you echo it. This is expected because it is not possible to overflow values like "32 days" which could be interpreted as anything from "1 month and 4 days" to "1 month and 1. net for that word, I obviously never got to the constructor page. That however will lose your nice 9 months = 0. DateInterval::__construct. Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyPHP Collective Join the discussion This question is in a collective: a subcommunity defined by tags with relevant content and experts. This class can parse, manipulate and format dates. 5. A minute may span 59, 60, or 61 seconds, an hour may contain 3599, 3600, or 3601 seconds. Syntax: DateInterval DatePeriod::getDateInterval ( void ) Parameters: This function does not accept any parameters. The form element collects year, month, day, hour, minute and seconds, and by passing the #granularity, the developer can select which time elements should be included. As of now I can compute the time difference between the two datetimes excluding the Saturdays and Sundays. これは、日付間隔を表す PHP のクラスです。また、入力文字列を受け入れ、入力文字列から DateInterval を設定する静的メソッドも提供します。 DateInterval() の構文 The DateInterval class ¶ (PHP 5 >= 5. Hour,-169,Today()), then the date field will convert to date time. There are two ways to obtain the date and time in PHP. DateTime::createFromFormat — Parses a time string according to a specified format. The format method is then used to output the date in the desired format of "m-Y". 4. You will also have to use the letter T for intervals which contain a time component. days. Two seconds is PT2S. This code starts every week on a thursday and ends on a wednesday. That is, it supports a decimal fraction to the smallest time value in a representation. Hour (0 through 23) Minute 8: Minute (0 through 59) Month 2: Month (1 through 12) Quarter 1: Quarter of year (1 through 4) Second 9:. If I use Pacific/Honolulu or UTC in date_default_timezone_set() it works fine. So it's pretty simple. ,It looks like PHP 5. . I'm really stuck with adding X minutes to a datetime, after doing lots of google'ing and PHP manual reading, I don't seem to be getting anywhere. (PHP 5 >= 5. It is a Class of PHP that represents a date interval. PHP: define start date for interval. ini or declared in Twig -- see below), but you can override it by explicitly specifying a timezone: 1. mktime alternative. 0 but DateInterval as well as some DateTime methods are not available prior to 5. 1 hour and 10 minutes: There are two things you need to keep in mind when setting the length. PHP DateInterval: Diff between same date in two different months is not one month. Jun 9, 2017 at 20:26 | Show 1. The DateInterval constructor accepts. josh dot love at verizon dot net. itself is not changed in the calling program. Number of microseconds, as a fraction of a second. Each duration period is represented by an integer value followed by a period designator. Valor Retornado. 0. ics file as an event end date (publishing a calendar file). 5. Like DateTimeImmutable::sub() but works with DateTime . . Three refreshes right now at 9:51pm give the following results: 2013-03-26 09:09:03, 2013-03-26 09:17:03, 2013-03-26 09:30:03This is a direct port of the code that PHP uses internally to calculate ranges, with the exception that it doesn't take daylight savings time into account. PT6H: A period of six hours. . Please note this assumes that all days are 24hrs which may not. There is a fundamental problem with comparing two DateInterval 's. For example, if you only are interested in hour difference, and you know that difference can't be more than 24 hours, then use only %H. If you're stuck with 5. (available as of PHP 8. I'm talking about two issues: (1) the number of days in the month which varies from months 1-12 as well as for month 2 which could be leap year (or not); and then issue (2): what if there is the need to specify a large. 1. If you are stuck in a position where all you have is the DateInterval, and you (like me) discover that there seems to be no way to get the total minutes, seconds or. 400 seconds. For instance: Time In: 11:35:20 (hh:mm:ss), now say the current time is: 12:00:45 (hh:mm:ss) then the time difference in my formula gives the output: 1:-34:25. 0, using the DateInterval class. I tried to add +2 hours to date function visualization in php (wordpress). If you're interested in 'one year from now', you have to pass in an interval of 'one year'. Carbon 类声明在 Carbon 命名空间下，可以通过引入命名空间的方式来代替每次输入完整的类. Why isn't the last date included or why there isn't a flag like DatePeriod::EXCLUDE_START_DATE to INCLUDE_END_DATE , I don't know. Get difference of two date in user friendly format using php. I have this string object in my php array "2013-03-05 00:00:00+00" I would like to add 12 hours to the entry within PHP, then save it back to string in the same format. DateTime is an awesome feature in PHP. 0. $newTime = $current->format('Y. . but only for some dates, and only in some time zones. 1. DateInterval is only a "length" without a start and end date, as oppose to DatePeriod. The idea is to. This form element takes in 8601 Duration Strings or PHP DateInterval objects as its value/default value, and outputs PHP DateInterval objects upon form submission. In 8. 0. Thanks again – Eric Evans. xxxxxxxxxx. Hi All I'm trying to calculate elapsed time in php. Php date function -1 month issue. Value, dtpTimeOut. Difference. 3. 1. . A minute may span 59, 60, or 61 seconds, an hour may contain 3599, 3600, or 3601 seconds. PHP provides a set of date and time classes that allow you to work with the date and time in an object-oriented way. Converting seconds into period of time. This function returns a new DateTime object. Then, when converting from seconds, it would divide in that order, each time taking the modulo of the previous operation, until only <60 seconds are left. PHP Collective Join the discussion. Um objeto DateInterval. 0 이후 지원되는 은 다른 언어들과 비교하면 아직 모자란 부분이 많이 있지만 그래도 쓸…I would like to calculate with PHP the start and end datetime of an event. Example #1 DateTimeImmutable::add/sub add intervals which cover elapsed time Adding PT24H over a DST transition will appear to add 23/25 hours (for most timezones). 00PM'; $date = new DateTime ($string); $interval = new DateInterval ('PT6H'); $date. The field can be rendered in a variety of different ways (see widget) and can be configured to give you a DateInterval. $timezone = new DateTimeZone('America/New_York'); $date1 = new DateTime (date("Y:m:d H:i:s", time()), $timezone); $date1->add(new DateInterval. During night from 2018-03-24 to 2018-03-25 (timezone change from CET to CEST in France), I noticed a strange behavior : the DateInterval result was 1 hour less than expected. You can use '%d' to get the days but it will also return 0 in the case of new \DateInterval('P1Y') as it does not convert years to days. Create two DateTime intervals with your start and end times, and a DateInterval instance with the number of minutes you need. For example, you can add 10 minutes to 31 December 1999 23:55, and DateAdd automatically recalculates all elements of the date to return a valid date, in this case 1 January 2000 00:05. Using DateTime::diff() function. We will further analyze their implementations. If you are stuck in a position where all you have is the DateInterval, and you (like me) discover that there seems to be no way to get the total minutes, seconds or whatever of the interval, the solution is to create a DateTime at zero time, add the interval to it, and then get the resulting timestamp: Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand I had the same situation. Follow answered Jan 28, 2015 at 15:10. key vendor/bin. Rather than work to create a high-precision numeric date/time, I convert the microsecond value to a string, remove the 0, and add it to the end of the date/time string. Dim OvertimeLimit As Decimal = 4D. In effect you are telling php to create a period of 1 hour between the two dates, within 1 second of time. I may convert the values of hours, minutes and seconds to zeroes. 0, php 7) DateTime::sub -- date_sub — Subtracts an amount of days, months, years, hours, minutes and seconds from a DateTime object Descrierea In that regard, what PHP 8. But the. Not as compact as if you did convert it to one unit of time and store it as an int, but much more compact than serializing the DateInterval object and storing the whole thing. The DateInterval class is useful for storing a specific amount of time mentioned in terms of years, months, hours etc. And I don't mean by just a couple seconds like one would expect, I mean lots of minutes. In PHP 7 this works (gives e. VersionEs 1 si el intervalo representa un periodo de tiempo negativo y 0 si no. 0) Examples: Z or +02:00: T: Timezone abbreviation, if known; otherwise the GMT offset. $current->add(new DateInterval("PT{$hoursToAdd}H")); //Format the new time into a more human-friendly format //and print it out. here is my code so far (does. Then, create a DatePeriod with this information, and iterate over it to show the resulting times:Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyCarbon 是php的日期处理类库（A simple PHP API extension for DateTime. In 8. I get the start of this event and the duration to add to get the end. It is probably not a very portable solution, but it seems to be working just fine in php 5. 3. So, sorry for not being clear. js, Java, C#, etc. Calculate total seconds in PHP DateInterval. The idea is to parse the given dates into DateTime objects and find the difference between the two with. Return a specified part of a date: SELECT DATEPART (minute, '2017/08/25 08:36') AS DatePartInt; Try it Yourself ». 7 it adds 1 to the hour to make it go from 1 to 2, without being tipped up by the DST transition. Net also provides powerful tools for date arithmetic that makes manipulating dates easy. Hier ist ein Beispiel, das zeigt, wie einfach es ist, Datums- und Uhrzeitangaben in PHP hinzuzufügen oder zu subtrahieren. Calculated date is before 00:00:00 on January 1 of the year 1, or later than 23:59:59 on December 31, 9999. PHP Collective Join the discussion. These are the top rated real world PHP examples of DateInterval extracted from open source projects. 2 から追加された DateTime クラスの2種類が存在します。. format. Hot Network Questions Tricky Integral: Evaluating Renormalized Ultraviolet "Divergent" IntegralHere are some simple examples. They will receive two different dates in their constructors. DateTime::__construct — Returns new DateTime object. Véase DateInterval::format(). 3 is as expected. If you are stuck in a position where all you have is the DateInterval, and you (like me) discover that there seems to be no way to get the total minutes, seconds or whatever of the interval, the solution is to create a DateTime at zero time, add the interval to it, and then get the resulting timestamp:Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyPHP has no operator overloading* so + with objects makes PHP trying it to convert them to string first, but DateInterval does not support that:. 2,824 1 1 gold badge 25 25 silver badges 36 36 bronze badges 1 "The ISO 8601 standard for duration is a string in the form of P{y}Y{m1}M{d}DT{h}H{m2}M{s}S where the {*} parts are replaced by a number value indicating how long the duration is. At a minimum I need the code to understand weekends, but ideally it should account for US federal holidays as well. starttime: 2016-11-30 03:55:06 endtime: 2016-11-30 11:55:06 php; timestamp; Share. Constructors. Un objet DateInterval. You can use the DateTime object in PHP to subtract one month from a date formatted with date ('m-Y'). First, follow their installation instructions. interval A DateInterval object Return Values ¶ Returns the modified DateTime object for method chaining. – Paul Feakins Dec 15, 2020 at 14:52Return a specified part of a date: SELECT DATEPART (hour, '2017/08/25 08:36') AS DatePartInt; Try it Yourself ». What you can do with this function/method is a great example of the philosophy: "just because you can do it doesn't mean you should". 9, where 9 months will become 0. PHP Manual - DatePeriod. Is 1 if the interval represents a negative time period and 0 otherwise. How to add timestamp to Minutes in php. Date and time manipulation is an unavoidable part of programming; there will inevitably be a part of a project that requires a date to be modified. And since there's no 25 o'clock, it's the wrong thing to use. Jun 9, 2017 at 20:25. Véase DateInterval::format(). 3. NOTE: This approach does not work for intervals less than a day with time-zones that recognize DST, due to a known issue with dates and the DST hour changes. You can find the time difference between two dates using the diff() method of the DateTime class. Object : Specifies a DateTime object returned by date_create(). is not coercible to. Create your own server using Python, PHP, React. php date next month gives wrong day. Unexpected DateTime DateInterval DatePeriod results. These are the top rated real world PHP examples of DateInterval::createFromDateString extracted from open source projects. Program 2: This program uses DateTime::sub () function to subtract the given interval from date object. Try var_dump(sumDateIntervals(new DateInterval('P0DT30S'), new DateInterval('P0DT30S')));, which I would expect to come back with P0Y0M0DT0H1M0S instead it comes back with P0Y0M0DT0H0M60S, which might be equivalent, but imagine any where time-component S or M are both > 30, H are both > 12. VB. Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyAn expression representing the date and time to which the interval is to be added. . Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyHaving a look on the PHP documentation, the following two methods of the DateTime object would both seem to solve my problem:. FALSE on failure: PHP Version:There are no user contributed notes for this page. 5Y P2. This class’s constructor takes the given interval as a string that starts with P. There's DateInterval though, which handles date intervals. 5. As stated in the documentation to DateInterval::format The DateInterval::format() method does not recalculate carry over points in time strings nor in date segments. In effect you are telling php to create a period of 1 hour between the two dates, within 1 second of time. I only said that it could be improved by giving the OP the alternative he is looking for (and its not like adding a link to DateTime::modify would. 48. The optional timestamp parameter is an int Unix timestamp that defaults to the current local time if timestamp is omitted or null. In my current code I create three objects and have to call a method on 2 of them. PT1H specifies 1 hour. How to create a DateInterval from a time string.