How to correctly add a date and a time (string) in PHP?












0














What is the "cleanest" way to add a date and a time string in PHP?



Albeit having read that DateTime::add expects a DateInterval, I tried



$date = new DateTime('17.03.2016');

$time = new DateTime('20:20');

$result = $date->add($time);


Which was no good and returned nothing to $result.



To make a DateInterval from '20:20', I only found very complex solutions...



Maybe I should use timestamps?



$date = strtotime($datestring);

$timeObj = new DateTime($timestring);

// quirk to only get time in seconds from string date

$time = $timeObj->format('H') * 3600 + $timeObj->format('i') * 60 + $timeObj->format('s');

$datetime = $date+$time;

$result = new DateTime;

$result->setTimestamp($datetime);


In my case, this returns the desired result, with the correct timezone offset. But what do you think, is this robust? Is there a better way?






php datetime dateinterval







share|improve this question


















  • 1




    I like to use Carbon (carbon.nesbot.com)
    – Felippe Duarte
    Nov 23 '18 at 18:12










  • Nice one! For a bigger project
    – Urs
    Nov 23 '18 at 19:24
















0














What is the "cleanest" way to add a date and a time string in PHP?



Albeit having read that DateTime::add expects a DateInterval, I tried



$date = new DateTime('17.03.2016');

$time = new DateTime('20:20');

$result = $date->add($time);


Which was no good and returned nothing to $result.



To make a DateInterval from '20:20', I only found very complex solutions...



Maybe I should use timestamps?



$date = strtotime($datestring);

$timeObj = new DateTime($timestring);

// quirk to only get time in seconds from string date

$time = $timeObj->format('H') * 3600 + $timeObj->format('i') * 60 + $timeObj->format('s');

$datetime = $date+$time;

$result = new DateTime;

$result->setTimestamp($datetime);


In my case, this returns the desired result, with the correct timezone offset. But what do you think, is this robust? Is there a better way?






php datetime dateinterval







share|improve this question


















  • 1




    I like to use Carbon (carbon.nesbot.com)
    – Felippe Duarte
    Nov 23 '18 at 18:12










  • Nice one! For a bigger project
    – Urs
    Nov 23 '18 at 19:24














0












0








0







What is the "cleanest" way to add a date and a time string in PHP?



Albeit having read that DateTime::add expects a DateInterval, I tried



$date = new DateTime('17.03.2016');

$time = new DateTime('20:20');

$result = $date->add($time);


Which was no good and returned nothing to $result.



To make a DateInterval from '20:20', I only found very complex solutions...



Maybe I should use timestamps?



$date = strtotime($datestring);

$timeObj = new DateTime($timestring);

// quirk to only get time in seconds from string date

$time = $timeObj->format('H') * 3600 + $timeObj->format('i') * 60 + $timeObj->format('s');

$datetime = $date+$time;

$result = new DateTime;

$result->setTimestamp($datetime);


In my case, this returns the desired result, with the correct timezone offset. But what do you think, is this robust? Is there a better way?






php datetime dateinterval







share|improve this question













What is the "cleanest" way to add a date and a time string in PHP?



Albeit having read that DateTime::add expects a DateInterval, I tried



$date = new DateTime('17.03.2016');

$time = new DateTime('20:20');

$result = $date->add($time);


Which was no good and returned nothing to $result.



To make a DateInterval from '20:20', I only found very complex solutions...



Maybe I should use timestamps?



$date = strtotime($datestring);

$timeObj = new DateTime($timestring);

// quirk to only get time in seconds from string date

$time = $timeObj->format('H') * 3600 + $timeObj->format('i') * 60 + $timeObj->format('s');

$datetime = $date+$time;

$result = new DateTime;

$result->setTimestamp($datetime);


In my case, this returns the desired result, with the correct timezone offset. But what do you think, is this robust? Is there a better way?






php datetime dateinterval




php datetime dateinterval






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 23 '18 at 17:42









Urs

3,24843382




3,24843382








  • 1




    I like to use Carbon (carbon.nesbot.com)
    – Felippe Duarte
    Nov 23 '18 at 18:12










  • Nice one! For a bigger project
    – Urs
    Nov 23 '18 at 19:24














  • 1




    I like to use Carbon (carbon.nesbot.com)
    – Felippe Duarte
    Nov 23 '18 at 18:12










  • Nice one! For a bigger project
    – Urs
    Nov 23 '18 at 19:24








1




1




I like to use Carbon (carbon.nesbot.com)
– Felippe Duarte
Nov 23 '18 at 18:12




I like to use Carbon (carbon.nesbot.com)
– Felippe Duarte
Nov 23 '18 at 18:12












Nice one! For a bigger project
– Urs
Nov 23 '18 at 19:24




Nice one! For a bigger project
– Urs
Nov 23 '18 at 19:24












2 Answers
2






active

oldest

votes


















1














If you want to add 20 hours and 20 minutes to a DateTime:



$date = new DateTime('17.03.2016');

$date->add($new DateInterval('PT20H20M'));


You do not need to get the result of add(), calling add() on a DateTime object will change it. The return value of add() is the DateTime object itself so you can chain methods.



See DateInterval::__construct to see how to set the intervals.






share|improve this answer































    1














    DateTime (and DateTimeImmutable) has a modify method which you could leverage to modify the time by adding 20 hours and 20 minutes.



    Updated



    I've included examples for both DateTime and DateTimeImmutable as per the comment made, you don't need to assign the outcome of modify to a variable because it mutates the original object. Whereas DateTimeImmutable creates a new instance and doesn't mutate the original object.



    DateTime



    <?php
    

    
$start = new DateTimeImmutable('2018-10-23 00:00:00');
    
echo $start->modify('+20 hours +20 minutes')->format('Y-m-d H:i:s');
    

    
// 2018-10-23 20:20:00


    Using DateTime: https://3v4l.org/6eon8



    DateTimeImmutable



    <?php
    

    
$start = new DateTimeImmutable('2018-10-23 00:00:00');
    
$datetime = $start->modify('+20 hours +20 minutes');
    

    
var_dump($start->format('Y-m-d H:i:s'));
    
var_dump($datetime->format('Y-m-d H:i:s'));


    Output




    string(19) "2018-10-23 00:00:00"



    string(19) "2018-10-23 20:20:00"




    Using DateTimeImmutable: https://3v4l.org/oRehh






    share|improve this answer























    • There is no need to create another reference to the DateTime object. modify() returns the DateTime object itself. So $start and $datetime simply point to the same DateTime object.
      – Ron Dobley
      Nov 23 '18 at 18:26










    • Yes that's correct, my original example should have used DateTimeImmutable instead. I've updated my answer.
      – steadweb
      Nov 23 '18 at 18:44










    • So in the first block, it should be $start = new DateTime('2018-10-23 00:00:00'); right?
      – Urs
      Nov 23 '18 at 19:23










    • Any advantages of modify over add as shown by @ron-dobley ?
      – Urs
      Nov 23 '18 at 19:25










    • As far as I'm aware, they're pretty similar. It'll be preference of how the code looks compared to performance.
      – steadweb
      Nov 23 '18 at 19:30











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    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    1














    If you want to add 20 hours and 20 minutes to a DateTime:



    $date = new DateTime('17.03.2016');
    
$date->add($new DateInterval('PT20H20M'));


    You do not need to get the result of add(), calling add() on a DateTime object will change it. The return value of add() is the DateTime object itself so you can chain methods.



    See DateInterval::__construct to see how to set the intervals.






    share|improve this answer




























      1














      If you want to add 20 hours and 20 minutes to a DateTime:



      $date = new DateTime('17.03.2016');
      
$date->add($new DateInterval('PT20H20M'));


      You do not need to get the result of add(), calling add() on a DateTime object will change it. The return value of add() is the DateTime object itself so you can chain methods.



      See DateInterval::__construct to see how to set the intervals.






      share|improve this answer


























        1












        1








        1






        If you want to add 20 hours and 20 minutes to a DateTime:



        $date = new DateTime('17.03.2016');
        
$date->add($new DateInterval('PT20H20M'));


        You do not need to get the result of add(), calling add() on a DateTime object will change it. The return value of add() is the DateTime object itself so you can chain methods.



        See DateInterval::__construct to see how to set the intervals.






        share|improve this answer














        If you want to add 20 hours and 20 minutes to a DateTime:



        $date = new DateTime('17.03.2016');
        
$date->add($new DateInterval('PT20H20M'));


        You do not need to get the result of add(), calling add() on a DateTime object will change it. The return value of add() is the DateTime object itself so you can chain methods.



        See DateInterval::__construct to see how to set the intervals.







        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited Nov 23 '18 at 18:23

























        answered Nov 23 '18 at 18:16









        Ron Dobley

        887




        887

























            1














            DateTime (and DateTimeImmutable) has a modify method which you could leverage to modify the time by adding 20 hours and 20 minutes.



            Updated



            I've included examples for both DateTime and DateTimeImmutable as per the comment made, you don't need to assign the outcome of modify to a variable because it mutates the original object. Whereas DateTimeImmutable creates a new instance and doesn't mutate the original object.



            DateTime



            <?php
            

            
$start = new DateTimeImmutable('2018-10-23 00:00:00');
            
echo $start->modify('+20 hours +20 minutes')->format('Y-m-d H:i:s');
            

            
// 2018-10-23 20:20:00


            Using DateTime: https://3v4l.org/6eon8



            DateTimeImmutable



            <?php
            

            
$start = new DateTimeImmutable('2018-10-23 00:00:00');
            
$datetime = $start->modify('+20 hours +20 minutes');
            

            
var_dump($start->format('Y-m-d H:i:s'));
            
var_dump($datetime->format('Y-m-d H:i:s'));


            Output




            string(19) "2018-10-23 00:00:00"



            string(19) "2018-10-23 20:20:00"




            Using DateTimeImmutable: https://3v4l.org/oRehh






            share|improve this answer























            • There is no need to create another reference to the DateTime object. modify() returns the DateTime object itself. So $start and $datetime simply point to the same DateTime object.
              – Ron Dobley
              Nov 23 '18 at 18:26










            • Yes that's correct, my original example should have used DateTimeImmutable instead. I've updated my answer.
              – steadweb
              Nov 23 '18 at 18:44










            • So in the first block, it should be $start = new DateTime('2018-10-23 00:00:00'); right?
              – Urs
              Nov 23 '18 at 19:23










            • Any advantages of modify over add as shown by @ron-dobley ?
              – Urs
              Nov 23 '18 at 19:25










            • As far as I'm aware, they're pretty similar. It'll be preference of how the code looks compared to performance.
              – steadweb
              Nov 23 '18 at 19:30
















            1














            DateTime (and DateTimeImmutable) has a modify method which you could leverage to modify the time by adding 20 hours and 20 minutes.



            Updated



            I've included examples for both DateTime and DateTimeImmutable as per the comment made, you don't need to assign the outcome of modify to a variable because it mutates the original object. Whereas DateTimeImmutable creates a new instance and doesn't mutate the original object.



            DateTime



            <?php
            

            
$start = new DateTimeImmutable('2018-10-23 00:00:00');
            
echo $start->modify('+20 hours +20 minutes')->format('Y-m-d H:i:s');
            

            
// 2018-10-23 20:20:00


            Using DateTime: https://3v4l.org/6eon8



            DateTimeImmutable



            <?php
            

            
$start = new DateTimeImmutable('2018-10-23 00:00:00');
            
$datetime = $start->modify('+20 hours +20 minutes');
            

            
var_dump($start->format('Y-m-d H:i:s'));
            
var_dump($datetime->format('Y-m-d H:i:s'));


            Output




            string(19) "2018-10-23 00:00:00"



            string(19) "2018-10-23 20:20:00"




            Using DateTimeImmutable: https://3v4l.org/oRehh






            share|improve this answer























            • There is no need to create another reference to the DateTime object. modify() returns the DateTime object itself. So $start and $datetime simply point to the same DateTime object.
              – Ron Dobley
              Nov 23 '18 at 18:26










            • Yes that's correct, my original example should have used DateTimeImmutable instead. I've updated my answer.
              – steadweb
              Nov 23 '18 at 18:44










            • So in the first block, it should be $start = new DateTime('2018-10-23 00:00:00'); right?
              – Urs
              Nov 23 '18 at 19:23










            • Any advantages of modify over add as shown by @ron-dobley ?
              – Urs
              Nov 23 '18 at 19:25










            • As far as I'm aware, they're pretty similar. It'll be preference of how the code looks compared to performance.
              – steadweb
              Nov 23 '18 at 19:30














            1












            1








            1






            DateTime (and DateTimeImmutable) has a modify method which you could leverage to modify the time by adding 20 hours and 20 minutes.



            Updated



            I've included examples for both DateTime and DateTimeImmutable as per the comment made, you don't need to assign the outcome of modify to a variable because it mutates the original object. Whereas DateTimeImmutable creates a new instance and doesn't mutate the original object.



            DateTime



            <?php
            

            
$start = new DateTimeImmutable('2018-10-23 00:00:00');
            
echo $start->modify('+20 hours +20 minutes')->format('Y-m-d H:i:s');
            

            
// 2018-10-23 20:20:00


            Using DateTime: https://3v4l.org/6eon8



            DateTimeImmutable



            <?php
            

            
$start = new DateTimeImmutable('2018-10-23 00:00:00');
            
$datetime = $start->modify('+20 hours +20 minutes');
            

            
var_dump($start->format('Y-m-d H:i:s'));
            
var_dump($datetime->format('Y-m-d H:i:s'));


            Output




            string(19) "2018-10-23 00:00:00"



            string(19) "2018-10-23 20:20:00"




            Using DateTimeImmutable: https://3v4l.org/oRehh






            share|improve this answer














            DateTime (and DateTimeImmutable) has a modify method which you could leverage to modify the time by adding 20 hours and 20 minutes.



            Updated



            I've included examples for both DateTime and DateTimeImmutable as per the comment made, you don't need to assign the outcome of modify to a variable because it mutates the original object. Whereas DateTimeImmutable creates a new instance and doesn't mutate the original object.



            DateTime



            <?php
            

            
$start = new DateTimeImmutable('2018-10-23 00:00:00');
            
echo $start->modify('+20 hours +20 minutes')->format('Y-m-d H:i:s');
            

            
// 2018-10-23 20:20:00


            Using DateTime: https://3v4l.org/6eon8



            DateTimeImmutable



            <?php
            

            
$start = new DateTimeImmutable('2018-10-23 00:00:00');
            
$datetime = $start->modify('+20 hours +20 minutes');
            

            
var_dump($start->format('Y-m-d H:i:s'));
            
var_dump($datetime->format('Y-m-d H:i:s'));


            Output




            string(19) "2018-10-23 00:00:00"



            string(19) "2018-10-23 20:20:00"




            Using DateTimeImmutable: https://3v4l.org/oRehh







            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited Nov 23 '18 at 18:43

























            answered Nov 23 '18 at 18:12









            steadweb

            5,14511223




            5,14511223












            • There is no need to create another reference to the DateTime object. modify() returns the DateTime object itself. So $start and $datetime simply point to the same DateTime object.
              – Ron Dobley
              Nov 23 '18 at 18:26










            • Yes that's correct, my original example should have used DateTimeImmutable instead. I've updated my answer.
              – steadweb
              Nov 23 '18 at 18:44










            • So in the first block, it should be $start = new DateTime('2018-10-23 00:00:00'); right?
              – Urs
              Nov 23 '18 at 19:23










            • Any advantages of modify over add as shown by @ron-dobley ?
              – Urs
              Nov 23 '18 at 19:25










            • As far as I'm aware, they're pretty similar. It'll be preference of how the code looks compared to performance.
              – steadweb
              Nov 23 '18 at 19:30


















            • There is no need to create another reference to the DateTime object. modify() returns the DateTime object itself. So $start and $datetime simply point to the same DateTime object.
              – Ron Dobley
              Nov 23 '18 at 18:26










            • Yes that's correct, my original example should have used DateTimeImmutable instead. I've updated my answer.
              – steadweb
              Nov 23 '18 at 18:44










            • So in the first block, it should be $start = new DateTime('2018-10-23 00:00:00'); right?
              – Urs
              Nov 23 '18 at 19:23










            • Any advantages of modify over add as shown by @ron-dobley ?
              – Urs
              Nov 23 '18 at 19:25










            • As far as I'm aware, they're pretty similar. It'll be preference of how the code looks compared to performance.
              – steadweb
              Nov 23 '18 at 19:30
















            There is no need to create another reference to the DateTime object. modify() returns the DateTime object itself. So $start and $datetime simply point to the same DateTime object.
            – Ron Dobley
            Nov 23 '18 at 18:26




            There is no need to create another reference to the DateTime object. modify() returns the DateTime object itself. So $start and $datetime simply point to the same DateTime object.
            – Ron Dobley
            Nov 23 '18 at 18:26












            Yes that's correct, my original example should have used DateTimeImmutable instead. I've updated my answer.
            – steadweb
            Nov 23 '18 at 18:44




            Yes that's correct, my original example should have used DateTimeImmutable instead. I've updated my answer.
            – steadweb
            Nov 23 '18 at 18:44












            So in the first block, it should be $start = new DateTime('2018-10-23 00:00:00'); right?
            – Urs
            Nov 23 '18 at 19:23




            So in the first block, it should be $start = new DateTime('2018-10-23 00:00:00'); right?
            – Urs
            Nov 23 '18 at 19:23












            Any advantages of modify over add as shown by @ron-dobley ?
            – Urs
            Nov 23 '18 at 19:25




            Any advantages of modify over add as shown by @ron-dobley ?
            – Urs
            Nov 23 '18 at 19:25












            As far as I'm aware, they're pretty similar. It'll be preference of how the code looks compared to performance.
            – steadweb
            Nov 23 '18 at 19:30




            As far as I'm aware, they're pretty similar. It'll be preference of how the code looks compared to performance.
            – steadweb
            Nov 23 '18 at 19:30


















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