How can I get month Interval in php using DateInterval. One thing to know is that the dates and times can be represented in three forms: a timestamp (i. date, and this for DateInterval): // Return adjusted start and end times as an array. Take the following example:Introduction. f. 1. . 2. 3. « date_interval_create_from_date_string. date() date_add(). I believe this involves converting the string to a date object. Adding or subtracting interval to a DateTime instance is quite easy. First, create a DateTime object from your base time. 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 companyNote you don't need DateInterval, as DateTime (like strtotime()) takes relative phrases as an argument, so you can just do something like new DateTime('+15 minutes'); – Alex Howansky Nov 2, 2022 at 15:39Let's say I have a date in the following format: 2010-12-11 (year-mon-day) With PHP, I want to increment the date by one month, and I want the year to be automatically incremented, if necessary (i. I have extended the php class. 1 +PHP Version: 7. Two methods we are going to described in this post. 0, PHP 7, PHP 8) DateInterval::format — Formats the intervalcheckdate() date_add() date_create_from_format() date_create() date_date_set() date_default_timezone_get() date_default_timezone_set() date_diff(). This function accepts an interval and a format string as parameters and, formats the given interval in the specified format. 0 이후 지원되는 은 다른 언어들과 비교하면 아직 모자란 부분이 많이 있지만 그래도 쓸…Get the current date and time. Introduction. You can't. Also note that I didnt say your question was invalid or inaccurate (since you stress that). Array ( [14] => Array // week ( [1] => 2013-04-01 [2] => 2013-04-02 [3] => 2013-04-03. 1, 7. 20/5. Find centralized, trusted content and collaborate around the technologies you use most. It is probably not a very portable solution, but it seems to be working just fine in php 5. Notas. Below programs illustrate the. Manual de PHP; Referencia de funciones; Extensiones relacionadas con fecha y hora. Take a look at the DateInterval constructor manual page to see how to construct other periods to add to your date (2 days would be 'P2D', 3 would be 'P3D', and so on). 0825% reliability fail you. How will 08-09-2008 be parsed? Probably 09 August 2008. 3's DateInterval supports this. El método DateInterval::format() no recalcula los excesos en cadenas de hora ni en segmentos de fecha. – Devon Bessemer Sep 24, 2015 at 13:47 DateInterval::format () メソッドは、 時刻文字列や日付セグメントでの繰り越しを再計算しません。. , or. DateTime::__construct — Returns new DateTime object. PHP TWIG date(H:i:s) from seconds. Collectives™ on Stack Overflow. Example if you need to display the time of 5 minutes and 2 seconds by showing a leading zero (05:02). The PHP documentation used to have Dates in the m/d/y or d-m-y formats are disambiguated by looking at the separator between the various components: if the separator is a slash (/), then the American m/d/y is assumed; whereas if the separator is a dash (-) or a dot (. DateTime class how to deal with negative date interval. (because we used the diff method of the DateTime class to generate the DateInterval object). Datetime is of the format Y-m-d H:i:s. Then, when converting from seconds, it would divide in that order, each time taking the modulo of the previous operation, until only <60 seconds. What about 2008-09-50?Some versions of PHP parse this as. I know I have to somehow operate with format. We can use the class DateInterval to add or subtract some interval in a DateTime object. You can add a comment by following this link or if you reported this bug, you can edit this bug over here. Date and Time Related Extensions. This does not allow for catching Date/Time exceptions as they are not specific enough. 2012-04-03 is a Tuesday. DatePeriod::getStartDate — Gets the start date. 1. PHP Collective Join the discussion This question is in a collective: a subcommunity defined by tags with relevant content and experts. Notas. The format starts with the letter P, for "period. " Each duration period is represented by an integer value followed by a period designator. See DateInterval::format () . You could access the public properties of the DateInterval class. Learn more about CollectivesDateTime supports microseconds since 5. Be aware that strtotime can sometimes get the timestamp wrong, if a slightly unconventional format is used. Numeric representation of a month, with or without leading zeros. 21. I'm trying to get all the Tuesdays and Wednesdays of every two weeks. I used a new DateTime in the example to demonstrate the point, but for now assume DateTime is returned from some opaque API that I can't just call over again. Follow edited Jun 20, 2020 at 9:12. Specifies the format. 目次. DateInterval::format() - Formatea el intervalo DateTime::add() - Añade una cantidad de días, meses, años, horas, minutos y segundos a un objeto DateTime DateTime::sub() - Sustrae una cantidad de días, meses, años, horas, minutos y segundos de un objeto DateTime ＋add a note(PHP 5 >= 5. If the DateInterval object was created by DateTime::diff(), then this is the total number of days between the start and end dates. Collectives™ on Stack Overflow. I don't want to use cron on Linux/Unix/BSD box or Scheduled Tasks on Windows. When using DateInterval() to create an interval you use M for minutes, not i. Table of Contents. Each format character must be prefixed by a percent sign (%). I also attempted to do it in a way which would fail to preserve number of days in each month (rounds to 30), leap years, etc: 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: Es 1 si el intervalo representa un periodo de tiempo negativo y 0 si no. The following code creates a PHP DatePeriod object based off user inputs. how to convert php date format to 3 arguments-1. PHP Date/Time Reference. PHP Terms → . timezoneの設定. Your output probably doesn't say days = -10 days, but something like days = -10ays. You can also use a DateTime and DateInterval to archieve your task. 3. There are some valid values as examples : 'now' (the default value) 2017-10-19; 2017-10-19 11:59:59; 2017-10. mktime alternative. But it wont return the number of seconds. The characters mentioned in the table below can be used in the format parameter string. ), then the European d-m-y format is assumed. The DateInterval class is useful for storing a. El método DateInterval::format() no recalcula los excesos en cadenas de hora ni en segmentos de fecha. Extract from the PHP dateinterval format documentation below. The foreach cycle goes at first through years, then months, then days, etc. See the example below, where we are adding an interval of 7 days and printing a message on the screen:@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 DateInterval: Diff between same date in two different months is not one month. Below programs illustrate the DatePeriod::getDateInterval () function in PHP: Program 1: <?php. PHP code demo Try this solution you can change from one month to another month (not year) and then check. 0. They will receive two different dates in their constructors. The iterator seems to check the time as well as the date, it excludes the end element if the time in the endDate is less that or equal to the time in the start date. echo $diff->format ("Total number of days: %a. If the DateInterval object was created by DateTime::diff(), then this is the total number of days between the start and end dates. e. 5 which returns a new DateTime object for every method call instead of updating it (slower). 1 min read September 30, 2020. G should be the same, but without leading zeroes though. PHP time(): Returns the current time measured in the number of seconds since the Unix Epoch (January 1 1970 00:00:00 GMT). The Overflow BlogSee the DateInterval constructor documentation: The format starts with the letter P, for "period. DateInterval::createFromDateString (PHP 5 >= 5. If you are using PHP 5. The DateInterval object, returned by date_diff stores each period of time separately, seconds, minutes, hours, days, months and years. DateTime::__construct — Returns new DateTime object. PHP DateInterval create split second (microsecond or milisecond) interval. This article does that, replacing as much as possible the principles and examples of the original article on a 1:1 basis. EDIT: After everyones suggestions i've tried setting this at the top of my php code: date_default_timezone_set("GMT"); and I tried using date('Y-m-d H:i:s') to do the comparison to figure out the diff, but its saying "3 hours ago" rather than the 10 hours from now. You can rate examples to help us improve the quality of examples. e. PHP DateTime->format incorrect month. Example. Otherwise, days will be FALSE. 3. I assumed you were starting with user input that you would use to create the DateInterval. Featured on MetaDateTime class Methods in PHP. 5. 3. Modified 8 years ago. One easy way to get the number of days is to create a DateTime at zero time, add the interval to it, and then get the resulting timestamp: Properties recurrences. Calculate the interval between two dates, then format the interval: <?php. Twig seems not recongnize the "%l" format to display minutes with leading zero. Syntax: Object oriented style:PHP에서의 DateTime은 늘 문자열로 처리되어 를 엄청나게 사용하게 되고, 기간 비교를 위해 timestamp를 직접 다뤄야 하는 번거로움 등 불편함을 다 적기에 시간이 부족할 정도다. H: 24-hour format of an hour with leading zeros 00 through 23. if you want all mondays between two dates, just get the julian dates which have mod 7 give 1 and convert them back to gregorian date format. –(PHP 5 >= 5. the code seem not working? as it only get one next and previous day. 3. The Duration class is introduced to ease duration manipulation. Need to reduce no of days, hours and minutes from a datetime using php. 0. DateInterval::__construct ( string $interval_spec ) This. Example: 2017-05-23 (tu) 2017-05-24 (we) 2017-06-06 (tu)Learn how to generate date or time ranges with the help of DatePeriod class. You don't need to pass time() to strtotime, as it is the default. Otherwise, days will be FALSE. 2. Getting time in seconds. PHP Terms. . 1. Hot Network Questions Handling a perceived over-reaction to a bug introduced by my teamHere are some simple examples. The formatting characters must be prefixed with a percent sign (%). (Like swap the positions of a characters in string) 0. How to validate dates without leading zero on day and month? 1. See DateInterval::format(). Adding an interval to a DateTime object. This should be used here and no detour via date, gmdate or DateTime should be taken. This code get next Monday and decrease it for 1 week. 3. Check if 1 timestamp is later then current. The DateInterval::format() method does not recalculate carry over points in time strings nor in date segments. Don't manually build json docs, I can't imagine what you think json_encode() is for, but it's for building the entire object. Calculate business days. e. While, on the surface, echoing a date in the future brings a small bit of accomplishment, it can be quickly eradicated when one is tasked with. I have released it under the MIT license, so feel free to build on top of it or use it in your own project. which object you call diff() from). See below example to Add 2 Day interval in date. DatePeriod::getEndDate — Gets the end date. Apart from that, your approach is correct - except that you take date('d') (which is putting out the day) and not date('m') for the month, so echo date('m', strtotime('+6 month')); should do. 以下のメソッドで使われます。この書式は他とは大きく見た目が異なりますが、非常にシンプルなので理解に困ることは無いでしょう。 DateInterval::__constructThe string representation of the interval must follow a specific format. As Carbon extends DateTime it inherit its methods such as diff() that take a second date object as argument and returns a DateInterval instance. これは意図的な仕様です。. 2. Create PHP DateInterval objects from floating point numbers for various date/time units. PHP에서의 DateTime은 늘 문자열로 처리되어 를 엄청나게 사용하게 되고, 기간 비교를 위해 timestamp를 직접 다뤄야 하는 번거로움 등 불편함을 다 적기에 시간이 부족할 정도다. DateInterval::format (PHP 5 >= 5. Syntax: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. I assumed you were starting with user input that you would use to create the DateInterval. This is expected because it is not possible to overflow values like "32 days" which could be interpreted as anything from "1. PHP Version. If you are not so familiar with the spec of DateInterval like PT12H30M you can proceed with more human readable way using DateInterval::createFromDateString as follows : When putting in the method format the parameters 'i' and 's' in lowercase, when the value to be displayed is less than 10, put a single digit. current community. php Object of class DateInterval could not be converted to string. For procedural style only: A DateInterval object. During daylight savings changes 24 hours is not the same as 1 day, which PHP will arrange for you with the proper timezone configuration. DateInterval: (PHP 5 >= 5. php. epoch time), a DateTime object, and a string. Aye, the method, how you can fix this also simple, create an another DateTime object, modify to the first day, then create a new DateTime object from the. 941999S for example. The following characters can be used in the format parameter string: % - Literal % Y - Year, at least 2 digits with leading zero (e. The minimum amount of instances as retured by the iterator. 3. Using the date() Function. You have to create two DateTime (they can be any date and time), add your interval to the second and substract the first from the second. The function expects to be given a string containing an 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. Diego Ferri. I want to send a reminder email. This should be used here and no detour via date, gmdate or DateTime should be taken. You can't use date to substract or add days (hours, minutes etc. Only missing some explanation of the DateInterval value P1D, so here are some Period Designator examples Two days : P2D Two seconds : PT2S One week and ten minutes : P1WT10M Y for years M for months D for days W for weeks. It uses the "natural" order of the variables in php DateInterval class. We also provide diffAsCarbonInterval() act like diff() but returns a CarbonInterval instance. PHP has no operator overloading* so + with objects makes PHP trying it to convert them to string first, but DateInterval does not support that: interval 1: 03:05 interval 2: 05:00 Total interval : 08:05 See DateInterval::format(). I have a DateTime, in my case 2021-03-28 08:45. this would be really straightforward if it was limited to days or hours - but it needs to support months, which can have variable lengths. format: Required. Now I need to be able to retrieve the integer and convert it back to a formatted string to be editable. It takes two parameters: the format and the timestamp. Adds the specified DateInterval object to the specified DateTime object. 3. ini file depending on whether it's running from the CLI or as a CGI from the webserver. PHP DateTime Interval errors. Example. . Main PHP Function Online page. I used DateInterval::format to display a human readable countdown clock in years, months, and days. DateTime::sub() - Sustrae una cantidad de días, meses, años, horas, minutos y segundos de un objeto DateTime DateTime::diff() - Devuelve la diferencia entre dos objetos DateTime DateTime::modify() - Altera la marca temporal ＋add a noteDateTimeComputed: Calculate the date value into a format that can be displayed in the widget. PHP Collective Join the discussion This question is in a collective: a subcommunity defined by tags with relevant content and experts. Then create a DateInterval with the appropriate format string that looks like this: 'PT' + NUMBER_OF_MINUTES + 'M'. 1. [2009-06-19 17:19 UTC] pierre dot inglebert at insa-rennes dot fr Description: ----- DateInterval::format method just returns the parameter given. DateTime::createFromImmutable. I believe this involves converting the string to a date object. Like DateTimeImmutable::add() but works with DateTime . Date/Time Arithmetic. DateInterval string Problems. なぜなら "32 days" のようにオーバーフローした値は "1 month and 4 days" から "1 month and 1 day" までのどれとでも解釈可能だからです。. echo date_create('2011-04-24')->modify('-1 days')->format('Y-m-d'); Running it on Online PHP Editor. The DateInterval::format () method does not recalculate carry over points in time strings nor in date segments. logos-php at kith dot org. This is expected because it is not possible to overflow values like "32 days" which could be interpreted as anything from "1. date_isodate_set ». 5. This is mentioned in the documentation for the date function, but bears repeating here. DateTimeオブジェクトの生成. A PHP interval is also used for the storage of a relative time string in a specific format which is supported by the constructor of the DateTime object. 31 years, 6 months, 14 days Code language: PHP (php) Check out all the DateInterval format parameters. josh dot love at verizon dot net. Changelog ¶ Examples ¶ Example #1 DateInterval example <?php Example. Meta Stack Overflow. Specifies the format. 1 second). A DateInterval created with new just never fills in that variable. " Each duration period is represented by an integer value followed by a period designator. DateTimeInterface::getOffset — Returns the timezone offset. DatePeriod objects can be used as an iterator to generate a number of DateTimeImmutable or DateTime object from a start date, a interval, and an end date or the number of recurrences. Nota: . PHP date interval format() Function - The date_interval_format() function is an alias of DateInterval::format(). Get early access. EXAMPLE CODE DOWNLOAD. DateTimeImmutable isn't available until php 5. PHPで日付や時刻を扱う方法をまとめました。. DatePeriod::getEndDate — Gets the end date. How to create split second DateInterval in PHP? For example: 0. なぜなら "32 days" のようにオーバーフローした値は "1 month and 4 days" から "1 month and 1 day" までのどれとでも解釈可能だからです。. To expand on the solution provided by Dave and the solution provided by Guss. By default, the date is displayed by applying the default timezone (the one specified in php. For example, if you want to allow the user to choose how often they receive a status email, they could use this field to choose intervals like every "10 minutes" or "3 days". The Overflow BlogThe above method will accurately return the first day of the previous month. DateTimeImmutable::sub() - Subtracts an 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 noteI want to create an array of objects for each day that the posted interval of time stretches, would this be a DateInterval object? if so then in the above posted values i want to get an array with the followingPHP Collective Join the discussion This question is in a collective: a subcommunity defined by tags with relevant content and experts. DateTime::createFromFormat — Parses a time string according to a specified format. I suspect that your PHP is set to a different timezone than +0800. Can you confirm your timezone (date_default_timezone_get())? EDITIf you are not so familiar with the spec of DateInterval like PT12H30M you can proceed with more human readable way using DateInterval::createFromDateString as follows :When putting in the method format the parameters 'i' and 's' in lowercase, when the value to be displayed is less than 10, put a single digit. Function Description. If the DateInterval object was created by DateTime::diff(), then this is the total number of days between the start and end 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". Stack Overflow is leveraging AI to summarize the most relevant questions and answers from the community, with the option to ask follow-up questions in a conversational format. The first iteration of the loop runs, but the second returns this error: PHP Fatal error: Call to a member function format() on a non-object . It seems when creating time-only DateInterval objects, we have to use T too, instead of just P. Otherwise. 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". If you prefer to avoid using string methods, or going into calculations, or even creating additional variables, mktime supports subtraction and negative values in the following way:PHP DateInterval::format - 30 examples found. Just an example to include the end date using the DateTime method 'modify'echo "<br>". The above code will output: 1837 days total 5 years 0 months 10 days 6 hours 14 minutes. 2. You don't have DateTime's anymore, you have interval, and intervals are formatted different as DateTime objects. f. DateInterval::format(format); Parameter Description; format: Required. While most of the previous answers will work fine for most cases, the established standard is to use DateTime objects for this instead, primarily due strtotime requiring careful manipulation of timezones and. When using the ISO 8601 duration format, T is the time designator that precedes the time components as explained here. More specifically, the information in an object of the DateInterval class is an instruction to get from one date/time to another date/time. I have got two arrows set up, click for next day, next two days, soon and previous day, two days ago, soon. Difference. And, well, you can't do what you want to a string. 4 Answers Sorted by: 8 The '%a' will return the number of days only when you take a time difference otherwise it will return unknown. Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand 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. The reason why you have the issue is simply that DateTime and DateInterval have different format types, DateInterval indeed requires to escape with a %-sign all the formatting symbols while DateTime uses the same format styles as date function. Description: ----- From PHP 7. I've found a user contributed note in the DateInterval documentation. One of the key-points of PHP 5 OOP that is often. 日付の差. And here's the extension to the initial DateInterval class:. 3. Each format character must be prefixed by a percent sign (%). g. Returns 05/07/2016 If the input date is going to be in mysql, you can perform this function on mysql directly, like this. 2. PHP DateInterval format minutes and seconds with leading zero. So PHP should add that with each iteration. はじめに. A date interval 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. Additionally the buildDate and releaseDate may be needed elsewhere in the code - such as being stored in a database, in other. About; Products For Teams;. DateIntervalType Field. DateInterval has a special format method for the output. Learn more about CollectivesSo it's pretty simple. Since version 4. Twig : DateInterval format minutes with leading zero don't work. To add an interval to date, you create a new DateInterval object and pass it to the add() method. PHP's DateInterval class was introduced in PHP version 5. The Overflow BlogTrying to create a list or date interval for the past 2 years, divided into ranges of 6 months, i. 3 is as expected. 3. For some reasons, I want to have the same thing as DateTime (or something close), but with microseconds precision (that I would convert to float when inserting inside the JSON files). How to Get the Date & Time in PHP. It also provides the static method, which accepts the input strings and sets up a DateInterval from the. But it is more readable like that. I built on Glavic's answer to add some extra features that I needed;. Find centralized, trusted content and collaborate around the technologies you use most. Specify the format. Another elegant and reliable method of fetching the previous month’s date is to use PHP’s DateTime(). 5. zu erhalten. I get several dateTime informations through an API. However, there is a lot of DateTime functionality that is simply not exposed procedurally, eg: properly modifying the timezone on a DateTime object. 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" . During daylight savings changes 24 hours is not the same as 1 day, which PHP will arrange for you with the proper timezone configuration. 1. 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 noteDateInterval::format() with "%F" sometimes shows incorrect value by 1us: Submitted: 2017-04-01 01:35 UTC: Modified: 2020-09-01 12:48 UTC: Votes: 1: Avg. The DateInterval:: format() function is used to format the interval. Datetime format as string not object-2. PHP Collective Join the discussion This question is in a collective: a subcommunity defined by tags with relevant content and experts. Is 1 if the interval represents a negative time period and 0 otherwise. @ibnɘꟻ I'm aware of it, but the ->format() gives you the ability to globally store the string format in config. DateTime::createFromFormat () Parses a time string according to a specified format. PHP DateInterval Class: The PHP DateInterval class is used to represent an interval between two dates or times. Zusammenfassung. . Number of microseconds, as a fraction of a second. $i = new DateInterval('P1D'); $i = DateInterval::createFromDateString('1 day'); $i = new. date_isodate_set ». DateInterval::__construct ( string $interval_spec ) This parameter has a specification described as below: The format starts with the letter P, for period. date_create(), date_format(), and most [but not all] other date_*() functions are just the procedural interfaces for interacting with DateTime objects. This will. For example when the user inputs. How to reduce 2 days , 3 hours and 10 minutes from this such that it results in 2013-03-18 11:10:00. But PHP also has a sub() method that lets you take any length of time away from a date. This makes the date 2010-02-31. 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. – [2009-06-19 17:19 UTC] pierre dot inglebert at insa-rennes dot fr Description: ----- DateInterval::format method just returns the parameter given. So I wrote my own bulky method but it feels like it should be simpler than this: public TimeSpan FromPhpDateInterval (string phpDateInterval) { // Method to parse php's interval_spec (An interval specification) // The format starts with the letter P, for "period. PHP date_add() function returns a DateTime object with added interval. . A workaround to add the T portion of the duration of the ISO 8601 standard and not need to default as P0M, is to insert 2 additional checks after the P0Y replaced by Y. Call to a member function add() on a non-object when trying to add to DateTime. echo date('Y-m-d', strtotime("+30 days")); strtotime. ShareWell, since format() is really there to let you specify the output format, the format string isn't optional. Using DateTime::diff() function. I suspect that your PHP is set to a different timezone than +0800. It seems like several things are wrong with your question. 5. DateInterval::invert will be 1 if the second date is before the first date, and 0 if the the second date is on or after the first date. Find centralized, trusted content and collaborate around the technologies you use most. Why does the 1st DateInterval Object return the value as [d] => 222 and the 2nd DateInterval Object as [days] => 62? What needs to be changed in order for the "222" to appear in the "[days]" tag? phpYou can then use the date Twig filter to format the DateInterval in the view. The W3Schools online code editor allows you to edit code and view the result in your browserPHP Collective Join the discussion This question is in a collective: a subcommunity defined by tags with relevant content and experts. 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. Out of scope of this RFC is changing and improving. Strictly it's doing the right thing, since your interval spec string. There are a number of interval properties in DateInterval class, you can check them out at PHP official site. PHP Manual. The DateTime class contains add() and sub() methods to manipulate a DateTime instance’s value. But the. This will give you the date in d/m/Y format while also assuming your initial date was in d/m/Y format.