php date validation

Question

Im trying to to set up a php date validation  MM DD YYYY  but I m having issues  Here is a sample of what I got    date regex      A 0 1-9  1 012   -     0 1-9   12  0-9  3 01   -     19 20  d d z       test date    03 22 2010    if  preg match  date regex   test date   POST  birthday      true         errors      user name most have no spaces

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We can use simple  date  input type  like below   Birth date   lt input type  date  name  userBirthDate    gt  lt br   gt    Then we can link DateTime interface with built-in function  explode    public function validateDate                  validateFlag   true           convertBirthDate   DateTime  createFromFormat  Y-m-d    this- gt birthDate            birthDateErrors   DateTime  getLastErrors             if   birthDateErrors  warning count      birthDateErrors  error count    gt  0                          SESSION  wrongDateFormat      The date format is wrong                       else                        testBirthDate   explode  -    this- gt birthDate               if   testBirthDate 0   lt  1900                                 validateFlag   false                    SESSION  wrongDateYear      We suspect that you did not born before XX century                                     return  validateFlag          I tested it on Google Chrome and IE  everything works correctly  Furthemore  Chrome display simple additional interface  If you don t write anything in input or write it in bad format  correctly is following   1919-12-23    you will get the first statement  If you write everything in good format  but you type wrong date  I assumed that nobody could born before XX century   your controller will send the second statement

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Though checkdate is good  this seems much concise function to validate and also you can give formats   Source   function validateDate  date   format    Y-m-d H i s          d   DateTime  createFromFormat  format   date       return  d  amp  amp   d- gt format  format      date      function was copied from this answer or php net   The extra - gt format   is needed for cases where the date is invalid but createFromFormat still manages to create a DateTime object  For example      Gives  2016-11-10      because Thursday falls on Nov 10 DateTime  createFromFormat  D M j Y    Thu Nov 9 2016        false  Nov 9 is a Wednesday validateDate  Thu Nov 9 2016    D M j Y

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I know this is an older post  but I ve developed the following function for validating a date   function IsDateTime  aDateTime        try            fTime   new DateTime  aDateTime            fTime- gt format  m d Y H i s            return true            catch  Exception  e            return false

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Use it   function validate Date  mydate  format    DD-MM-YYYY          if   format     YYYY-MM-DD   list  year   month   day    explode  -    mydate       if   format     YYYY MM DD   list  year   month   day    explode       mydate       if   format     YYYY MM DD   list  year   month   day    explode       mydate        if   format     DD-MM-YYYY   list  day   month   year    explode  -    mydate       if   format     DD MM YYYY   list  day   month   year    explode       mydate       if   format     DD MM YYYY   list  day   month   year    explode       mydate        if   format     MM-DD-YYYY   list  month   day   year    explode  -    mydate       if   format     MM DD YYYY   list  month   day   year    explode       mydate       if   format     MM DD YYYY   list  month   day   year    explode       mydate               if  is numeric  year   amp  amp  is numeric  month   amp  amp  is numeric  day           return checkdate  month  day  year       return false

User · Answer

This function working well  function validateDate  date   format    m d Y         d   DateTime  createFromFormat  format   date       return  d  amp  amp   d- gt format  format       date

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You can use some methods of the DateTime class  which might be handy  namely  DateTime  createFromFormat   in conjunction with DateTime  getLastErrors      test date    03 22 2010     date   DateTime  createFromFormat  m d Y    test date    date errors   DateTime  getLastErrors    if   date errors  warning count      date errors  error count    gt  0         errors      Some useful error message goes here        This even allows us to see what actually caused the date parsing warnings errors  look at the warnings and errors arrays in  date errors

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I think it will help somebody   function isValidDate  thedate         data              separators    gt  array       -                  date array    gt               day index    gt               year    gt               month    gt               day    gt               status    gt  false                loop through to break down the date     foreach   data  separators   as  separator             data  date array     explode  separator   thedate           if  count  data  date array       3                 data  status     true              break                          err  if more than 4 character or not int     if   data  status              foreach   data  date array   as  value                if  strlen  value   gt  4     is numeric  value                      data  status     false                  break                                        get the year     if   data  status              if  strlen  data  date array   0      4                 data  year      data  date array   0                data  day index     2           elseif  strlen  data  date array   2      4                 data  year      data  date array   2                data  day index     0           else                data  status     false                          get the month     if   data  status              if  strlen  data  date array   1      2                 data  month      data  date array   1            else                data  status     false                          get the day     if   data  status              if  strlen  data  date array    data  day index        2                 data  day      data  date array    data  day index              else                data  status     false                          finally validate date     if   data  status              return checkdate  data  month      data  day     data  year                return false

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Try This     19 0-9  2  2 0-9  3   - 0 1-9  1 0-2   - 0 1-9  1 0-9  2 0-9  3 0-1    T  s  0 0-9  1  1 0-9  1  2 0-3  1     0 0-9  1  1 0-9  1  2 0-9  1  3 0-9  1  4 0-9  1  5 0-9  1     0 0-9  1  1 0-9  1  2 0-9  1  3 0-9  1  4 0-9  1  5 0-9  1            d   4 8          this regular expression valid for     2017-01-01T00 00 00 0000  2017-01-01 00 00 00 00 00 2017-01-01T00 00 00 00 00 2017-01-01 00 00 00 0000 2017-01-01   Remember that this will be cover all case of date and date time with  -  character

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You could use checkdate  For example  something like this    test date    03 22 2010    test arr    explode       test date   if  checkdate  test arr 0    test arr 1    test arr 2             valid date         A more paranoid approach  that doesn t blindly believe the input    test date    03 22 2010    test arr    explode       test date   if  count  test arr     3        if  checkdate  test arr 0    test arr 1    test arr 2                 valid date           else              problem with dates             else          problem with input

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Nicolas solution is best   If you want in regex   try this   this will validate for  01 01 1900 through 12 31 2099  Matches invalid dates such as February 31st Accepts dashes  spaces  forward slashes and dots as date separators   0 1-9  1 012   -     0 1-9   12  0-9  3 01   -     19 20  0-9  2

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Not sure if this answer the question or going to help       dt    6 26 1970       or     6 26 1970      dt   preg replace                 dt     test arr    explode       dt    if  checkdate  test arr 0    test arr 1    test arr 2    amp  amp  preg match    0-9  1 2    0-9  1 2    0-9  4      dt           echo date  Y-m-d   strtotime   dt        lt br gt           else         echo  no good   format must be in mm dd yyyy

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Instead of the bulky DateTime object    just use the core date   function  function isValidDate  date   format   Y-m-d        return  date    date  format  strtotime  date

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REGEX should be a last resort  PHP has a few functions that will validate for you  In your case  checkdate is the best option  http   php net manual en function checkdate php

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