Formatting a number with leading zeros in PHP

Question

I have a variable which contains the value 1234567   I would like it to contain exactly 8 digits  i e  01234567   Is there a PHP function for that

User · Answer

Though I m not really sure what you want to do you are probably looking for sprintf   This would be    value   sprintf    08d   1234567

User · Answer

Simple answer   p   1234567   p   sprintf   08d   p     I m not sure how to interpret the comment saying  It will never be more than 8 digits  and if it s referring to the input or the output  If it refers to the output you would have to have an additional substr   call to clip the string   To clip the first 8 digits   p   substr sprintf   08d    p  0 8     To clip the last 8 digits   p   substr sprintf   08d    p  -8 8

User · Answer

no of digit   10   number   123    length   strlen  string  number   for  i    length  i lt  no of digit  i           number    0   number     echo  number           result 0000000123

User · Answer

You can always abuse type juggling   function zpad int  value  int  pad   string       return substr 1   value   10     pad       This wont work as expected if either 10    pad  gt  INT MAX or value  gt   10   pad

User · Answer

Use sprintf    sprintf   08d   1234567     Alternatively you can also use str pad   str pad  value  8   0   STR PAD LEFT

User · Answer

If the input numbers have always 7 or 8 digits  you can also use   str     input  lt  10000000    0    input    input    I ran some tests and get that this would be up to double as fast as str pad or sprintf  If the input can have any length  then you could also use   str   substr  00000000     input  -8     This is not as fast as the other one  but should also be a little bit faster than str pad and sprintf   Btw  My test also said that sprintf is a little faster than str pad  I made all tests with PHP 5 6   Edit  Altough the substr version seems to be still very fast  PHP 7 2   it also is broken in case your input can be longer than the length you want to pad to  E g  you want to pad to 3 digits and your input has 4 than substr  0000     1234   -3     234  will only result in the last 3 digits

User · Answer

This works perfectly    number   13246  echo sprintf    08d    number

User · Answer

I wrote this simple function to produce this format  01 00 03  Seconds are always shown  even if zero    Minutes are shown if greater than zero or if hours or days are required   Hours are shown if greater than zero or if days are required   Days are shown if greater than zero    function formatSeconds  secs         result             seconds   intval  secs    60       minutes    intval  secs    60    60       hours    intval  secs    3600    24       days   intval intval  secs     3600 24         if   days  gt  0             result   str pad  days  2   0   STR PAD LEFT                     if   hours  gt  0       result                  result    str pad  hours  2   0   STR PAD LEFT                     if    minutes  gt  0       result                  result    str pad  minutes  2   0   STR PAD LEFT                       seconds aways shown      result    str pad  seconds  2   0   STR PAD LEFT         return  result       funct   Examples   echo formatSeconds 15     15 echo formatSeconds 100     01 40 echo formatSeconds 10800     03 00 00  mins shown even if zero  echo formatSeconds 10000000     115 17 46 40

User · Answer

sprintf is what you need   EDIT  somehow requested by the downvotes   from the page linked above  here s a sample  zero-padded integers     lt  php      isodate   sprintf   04d- 02d- 02d    year   month   day     gt

User · Answer

When I need 01 instead of 1  the following worked for me    number   1   number   str pad  number  2   0   STR PAD LEFT

User · Answer

echo str pad  1234567   8   0   STR PAD LEFT

User · Answer

Given that the value is in  value    To echo it   printf   08d    value   To get it    formatted value   sprintf   08d    value     That should do the trick

[php] Formatting a number with leading zeros in PHP

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