Calculate last month, last 3 months, and last 6 months from today












6














I am looking for some ideas on how this could be improved:



switch ($periodValue) {
case "lastmonth":
$until = mktime(0, 0, 0, date('n'), 1, date('Y'));
$from = mktime(0, 0, 0, date('n', $until) - 1, 1, date('Y', $until));
break;
case "last3month":
$until = mktime(0, 0, 0, date('n'), 1, date('Y'));
$from = mktime(0, 0, 0, date('n', $until)-3, 1, date('Y', $until));
break;
case "last6month":
$until = mktime(0, 0, 0, date('n'), 1, date('Y'));
$from = mktime(0, 0, 0, date('n', $until)-6, 1, date('Y', $until));
break;


How could I make this "smarter", so that it works out if we are near the end of the month it will show the last 30 days instead of the previous month?










share|improve this question





























    6














    I am looking for some ideas on how this could be improved:



    switch ($periodValue) {
    case "lastmonth":
    $until = mktime(0, 0, 0, date('n'), 1, date('Y'));
    $from = mktime(0, 0, 0, date('n', $until) - 1, 1, date('Y', $until));
    break;
    case "last3month":
    $until = mktime(0, 0, 0, date('n'), 1, date('Y'));
    $from = mktime(0, 0, 0, date('n', $until)-3, 1, date('Y', $until));
    break;
    case "last6month":
    $until = mktime(0, 0, 0, date('n'), 1, date('Y'));
    $from = mktime(0, 0, 0, date('n', $until)-6, 1, date('Y', $until));
    break;


    How could I make this "smarter", so that it works out if we are near the end of the month it will show the last 30 days instead of the previous month?










    share|improve this question



























      6












      6








      6


      2





      I am looking for some ideas on how this could be improved:



      switch ($periodValue) {
      case "lastmonth":
      $until = mktime(0, 0, 0, date('n'), 1, date('Y'));
      $from = mktime(0, 0, 0, date('n', $until) - 1, 1, date('Y', $until));
      break;
      case "last3month":
      $until = mktime(0, 0, 0, date('n'), 1, date('Y'));
      $from = mktime(0, 0, 0, date('n', $until)-3, 1, date('Y', $until));
      break;
      case "last6month":
      $until = mktime(0, 0, 0, date('n'), 1, date('Y'));
      $from = mktime(0, 0, 0, date('n', $until)-6, 1, date('Y', $until));
      break;


      How could I make this "smarter", so that it works out if we are near the end of the month it will show the last 30 days instead of the previous month?










      share|improve this question















      I am looking for some ideas on how this could be improved:



      switch ($periodValue) {
      case "lastmonth":
      $until = mktime(0, 0, 0, date('n'), 1, date('Y'));
      $from = mktime(0, 0, 0, date('n', $until) - 1, 1, date('Y', $until));
      break;
      case "last3month":
      $until = mktime(0, 0, 0, date('n'), 1, date('Y'));
      $from = mktime(0, 0, 0, date('n', $until)-3, 1, date('Y', $until));
      break;
      case "last6month":
      $until = mktime(0, 0, 0, date('n'), 1, date('Y'));
      $from = mktime(0, 0, 0, date('n', $until)-6, 1, date('Y', $until));
      break;


      How could I make this "smarter", so that it works out if we are near the end of the month it will show the last 30 days instead of the previous month?







      php datetime






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Sep 10 '14 at 14:12









      Jamal

      30.2k11116226




      30.2k11116226










      asked Sep 25 '12 at 18:50









      John Magnolia

      158116




      158116






















          3 Answers
          3






          active

          oldest

          votes


















          8














          Try the DateTime class. In combination with the DateInterval class you can do something like this:



          $until = new DateTime();
          $interval = new DateInterval('P2M');//2 months
          $from = $until->sub($interval);
          echo 'from' . $from->format('Y-m-d') . 'until' . $until->format('Y-m-d');


          Also, you have to set the $until variable only once, before the switch statement.






          share|improve this answer































            0














            The date/time functions in PHP are a tricky thing. Last I looked into this there were known bugs with many of the date/time functions, especially around leap years, but no solutions. I don't know if that has changed, haven't had the need to look, so this answer might not be the best one, but have you tried strtotime()?



            $period = 30;//90 for 3 months, 180 for 6 months

            $until = strtotime( 'now' );
            $from = strtotime( "-$period days" );
            //or
            $period = 'last month';//'last 3 months', or 'last 6 months'
            $from = strtotime( $period );


            I've not tried any of the above, but I'm fairly confident the first half should work, but I'm not sure about the last half. However, strtotime() is a pretty smart function, so who knows. Hope it helps.






            share|improve this answer





















            • 90 days ago isn't actually 3 months ago. for example if now is 31/5/2018 which is the time of this comment.
              – deathemperor
              May 31 at 9:55



















            0














            $year = $data['year'];
            $month = $data['month'];
            $last_three_month_total_day = 0;
            for ( $i=0; $i <= 2 ; $i++ ){
            $last_three_month_total_day += cal_days_in_month(CAL_GREGORIAN,$month,$year);
            $month = $month -1 ;
            if($month == 0){ $month = 12; $year = $year-1 ;}
            }
            $result['last_three_month_total_day'] = $last_three_month_total_day;




            share








            New contributor




            pradip kor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.


















              Your Answer





              StackExchange.ifUsing("editor", function () {
              return StackExchange.using("mathjaxEditing", function () {
              StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
              StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["\$", "\$"]]);
              });
              });
              }, "mathjax-editing");

              StackExchange.ifUsing("editor", function () {
              StackExchange.using("externalEditor", function () {
              StackExchange.using("snippets", function () {
              StackExchange.snippets.init();
              });
              });
              }, "code-snippets");

              StackExchange.ready(function() {
              var channelOptions = {
              tags: "".split(" "),
              id: "196"
              };
              initTagRenderer("".split(" "), "".split(" "), channelOptions);

              StackExchange.using("externalEditor", function() {
              // Have to fire editor after snippets, if snippets enabled
              if (StackExchange.settings.snippets.snippetsEnabled) {
              StackExchange.using("snippets", function() {
              createEditor();
              });
              }
              else {
              createEditor();
              }
              });

              function createEditor() {
              StackExchange.prepareEditor({
              heartbeatType: 'answer',
              autoActivateHeartbeat: false,
              convertImagesToLinks: false,
              noModals: true,
              showLowRepImageUploadWarning: true,
              reputationToPostImages: null,
              bindNavPrevention: true,
              postfix: "",
              imageUploader: {
              brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
              contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
              allowUrls: true
              },
              onDemand: true,
              discardSelector: ".discard-answer"
              ,immediatelyShowMarkdownHelp:true
              });


              }
              });














              draft saved

              draft discarded


















              StackExchange.ready(
              function () {
              StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fcodereview.stackexchange.com%2fquestions%2f15923%2fcalculate-last-month-last-3-months-and-last-6-months-from-today%23new-answer', 'question_page');
              }
              );

              Post as a guest















              Required, but never shown

























              3 Answers
              3






              active

              oldest

              votes








              3 Answers
              3






              active

              oldest

              votes









              active

              oldest

              votes






              active

              oldest

              votes









              8














              Try the DateTime class. In combination with the DateInterval class you can do something like this:



              $until = new DateTime();
              $interval = new DateInterval('P2M');//2 months
              $from = $until->sub($interval);
              echo 'from' . $from->format('Y-m-d') . 'until' . $until->format('Y-m-d');


              Also, you have to set the $until variable only once, before the switch statement.






              share|improve this answer




























                8














                Try the DateTime class. In combination with the DateInterval class you can do something like this:



                $until = new DateTime();
                $interval = new DateInterval('P2M');//2 months
                $from = $until->sub($interval);
                echo 'from' . $from->format('Y-m-d') . 'until' . $until->format('Y-m-d');


                Also, you have to set the $until variable only once, before the switch statement.






                share|improve this answer


























                  8












                  8








                  8






                  Try the DateTime class. In combination with the DateInterval class you can do something like this:



                  $until = new DateTime();
                  $interval = new DateInterval('P2M');//2 months
                  $from = $until->sub($interval);
                  echo 'from' . $from->format('Y-m-d') . 'until' . $until->format('Y-m-d');


                  Also, you have to set the $until variable only once, before the switch statement.






                  share|improve this answer














                  Try the DateTime class. In combination with the DateInterval class you can do something like this:



                  $until = new DateTime();
                  $interval = new DateInterval('P2M');//2 months
                  $from = $until->sub($interval);
                  echo 'from' . $from->format('Y-m-d') . 'until' . $until->format('Y-m-d');


                  Also, you have to set the $until variable only once, before the switch statement.







                  share|improve this answer














                  share|improve this answer



                  share|improve this answer








                  edited Sep 10 '14 at 9:17









                  Anil Jaiswal

                  33




                  33










                  answered Sep 25 '12 at 20:59









                  Dirk McQuickly

                  20114




                  20114

























                      0














                      The date/time functions in PHP are a tricky thing. Last I looked into this there were known bugs with many of the date/time functions, especially around leap years, but no solutions. I don't know if that has changed, haven't had the need to look, so this answer might not be the best one, but have you tried strtotime()?



                      $period = 30;//90 for 3 months, 180 for 6 months

                      $until = strtotime( 'now' );
                      $from = strtotime( "-$period days" );
                      //or
                      $period = 'last month';//'last 3 months', or 'last 6 months'
                      $from = strtotime( $period );


                      I've not tried any of the above, but I'm fairly confident the first half should work, but I'm not sure about the last half. However, strtotime() is a pretty smart function, so who knows. Hope it helps.






                      share|improve this answer





















                      • 90 days ago isn't actually 3 months ago. for example if now is 31/5/2018 which is the time of this comment.
                        – deathemperor
                        May 31 at 9:55
















                      0














                      The date/time functions in PHP are a tricky thing. Last I looked into this there were known bugs with many of the date/time functions, especially around leap years, but no solutions. I don't know if that has changed, haven't had the need to look, so this answer might not be the best one, but have you tried strtotime()?



                      $period = 30;//90 for 3 months, 180 for 6 months

                      $until = strtotime( 'now' );
                      $from = strtotime( "-$period days" );
                      //or
                      $period = 'last month';//'last 3 months', or 'last 6 months'
                      $from = strtotime( $period );


                      I've not tried any of the above, but I'm fairly confident the first half should work, but I'm not sure about the last half. However, strtotime() is a pretty smart function, so who knows. Hope it helps.






                      share|improve this answer





















                      • 90 days ago isn't actually 3 months ago. for example if now is 31/5/2018 which is the time of this comment.
                        – deathemperor
                        May 31 at 9:55














                      0












                      0








                      0






                      The date/time functions in PHP are a tricky thing. Last I looked into this there were known bugs with many of the date/time functions, especially around leap years, but no solutions. I don't know if that has changed, haven't had the need to look, so this answer might not be the best one, but have you tried strtotime()?



                      $period = 30;//90 for 3 months, 180 for 6 months

                      $until = strtotime( 'now' );
                      $from = strtotime( "-$period days" );
                      //or
                      $period = 'last month';//'last 3 months', or 'last 6 months'
                      $from = strtotime( $period );


                      I've not tried any of the above, but I'm fairly confident the first half should work, but I'm not sure about the last half. However, strtotime() is a pretty smart function, so who knows. Hope it helps.






                      share|improve this answer












                      The date/time functions in PHP are a tricky thing. Last I looked into this there were known bugs with many of the date/time functions, especially around leap years, but no solutions. I don't know if that has changed, haven't had the need to look, so this answer might not be the best one, but have you tried strtotime()?



                      $period = 30;//90 for 3 months, 180 for 6 months

                      $until = strtotime( 'now' );
                      $from = strtotime( "-$period days" );
                      //or
                      $period = 'last month';//'last 3 months', or 'last 6 months'
                      $from = strtotime( $period );


                      I've not tried any of the above, but I'm fairly confident the first half should work, but I'm not sure about the last half. However, strtotime() is a pretty smart function, so who knows. Hope it helps.







                      share|improve this answer












                      share|improve this answer



                      share|improve this answer










                      answered Sep 25 '12 at 20:19









                      mseancole

                      5,8731926




                      5,8731926












                      • 90 days ago isn't actually 3 months ago. for example if now is 31/5/2018 which is the time of this comment.
                        – deathemperor
                        May 31 at 9:55


















                      • 90 days ago isn't actually 3 months ago. for example if now is 31/5/2018 which is the time of this comment.
                        – deathemperor
                        May 31 at 9:55
















                      90 days ago isn't actually 3 months ago. for example if now is 31/5/2018 which is the time of this comment.
                      – deathemperor
                      May 31 at 9:55




                      90 days ago isn't actually 3 months ago. for example if now is 31/5/2018 which is the time of this comment.
                      – deathemperor
                      May 31 at 9:55











                      0














                      $year = $data['year'];
                      $month = $data['month'];
                      $last_three_month_total_day = 0;
                      for ( $i=0; $i <= 2 ; $i++ ){
                      $last_three_month_total_day += cal_days_in_month(CAL_GREGORIAN,$month,$year);
                      $month = $month -1 ;
                      if($month == 0){ $month = 12; $year = $year-1 ;}
                      }
                      $result['last_three_month_total_day'] = $last_three_month_total_day;




                      share








                      New contributor




                      pradip kor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                      Check out our Code of Conduct.























                        0














                        $year = $data['year'];
                        $month = $data['month'];
                        $last_three_month_total_day = 0;
                        for ( $i=0; $i <= 2 ; $i++ ){
                        $last_three_month_total_day += cal_days_in_month(CAL_GREGORIAN,$month,$year);
                        $month = $month -1 ;
                        if($month == 0){ $month = 12; $year = $year-1 ;}
                        }
                        $result['last_three_month_total_day'] = $last_three_month_total_day;




                        share








                        New contributor




                        pradip kor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                        Check out our Code of Conduct.





















                          0












                          0








                          0






                          $year = $data['year'];
                          $month = $data['month'];
                          $last_three_month_total_day = 0;
                          for ( $i=0; $i <= 2 ; $i++ ){
                          $last_three_month_total_day += cal_days_in_month(CAL_GREGORIAN,$month,$year);
                          $month = $month -1 ;
                          if($month == 0){ $month = 12; $year = $year-1 ;}
                          }
                          $result['last_three_month_total_day'] = $last_three_month_total_day;




                          share








                          New contributor




                          pradip kor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                          Check out our Code of Conduct.









                          $year = $data['year'];
                          $month = $data['month'];
                          $last_three_month_total_day = 0;
                          for ( $i=0; $i <= 2 ; $i++ ){
                          $last_three_month_total_day += cal_days_in_month(CAL_GREGORIAN,$month,$year);
                          $month = $month -1 ;
                          if($month == 0){ $month = 12; $year = $year-1 ;}
                          }
                          $result['last_three_month_total_day'] = $last_three_month_total_day;





                          share








                          New contributor




                          pradip kor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                          Check out our Code of Conduct.








                          share


                          share






                          New contributor




                          pradip kor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                          Check out our Code of Conduct.









                          answered 8 mins ago









                          pradip kor

                          101




                          101




                          New contributor




                          pradip kor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                          Check out our Code of Conduct.





                          New contributor





                          pradip kor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                          Check out our Code of Conduct.






                          pradip kor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                          Check out our Code of Conduct.






























                              draft saved

                              draft discarded




















































                              Thanks for contributing an answer to Code Review Stack Exchange!


                              • Please be sure to answer the question. Provide details and share your research!

                              But avoid



                              • Asking for help, clarification, or responding to other answers.

                              • Making statements based on opinion; back them up with references or personal experience.


                              Use MathJax to format equations. MathJax reference.


                              To learn more, see our tips on writing great answers.





                              Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


                              Please pay close attention to the following guidance:


                              • Please be sure to answer the question. Provide details and share your research!

                              But avoid



                              • Asking for help, clarification, or responding to other answers.

                              • Making statements based on opinion; back them up with references or personal experience.


                              To learn more, see our tips on writing great answers.




                              draft saved


                              draft discarded














                              StackExchange.ready(
                              function () {
                              StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fcodereview.stackexchange.com%2fquestions%2f15923%2fcalculate-last-month-last-3-months-and-last-6-months-from-today%23new-answer', 'question_page');
                              }
                              );

                              Post as a guest















                              Required, but never shown





















































                              Required, but never shown














                              Required, but never shown












                              Required, but never shown







                              Required, but never shown

































                              Required, but never shown














                              Required, but never shown












                              Required, but never shown







                              Required, but never shown







                              Popular posts from this blog

                              404 Error Contact Form 7 ajax form submitting

                              How to know if a Active Directory user can login interactively

                              Refactoring coordinates for Minecraft Pi buildings written in Python