sort files by date in PHP

Question

I currently have an index php file which allows me to output the list of files inside the same directory  the output shows the names then I used filemtime   function to show the date when the file was modified  my problem now is  how will I sort the output to show the latest modified file    I ve been thinking for awhile how to do this  if only I am doing it with mysql interaction there will be no problem at all  please show me an example how to sort and output the list of files starting from the latest modified one  this is what i have for now  if   handle   opendir         while  false       file   readdir  handle             if   file         amp  amp   file                     lastModified   date  F d Y  H i s  filemtime  file              if strlen  file -strpos  file   swf     4               echo   lt tr gt  lt td gt  lt input type   checkbox   name   box     gt  lt  td gt  lt td gt  lt a href    file   target    blank   gt  file lt  a gt  lt  td gt  lt td gt  lastModified lt  td gt  lt  tr gt                                  closedir  handle

User · Answer

An example that uses RecursiveDirectoryIterator class  it s a convenient way to iterate recursively over filesystem    output   array    foreach  new RecursiveIteratorIterator       new RecursiveDirectoryIterator   path   FilesystemIterator  SKIP DOTS   FilesystemIterator  UNIX PATHS     as  value                   if    value- gt isFile                    output     array   value- gt getMTime     value- gt getRealPath                   usort    output  function   a   b         return  a 0   gt   b 0

User · Answer

I use your exact proposed code with only some few additional lines  The idea is more or less the same of the one proposed by  elias  but in this solution there cannot be conflicts on the keys since each file in the directory has a different filename and so adding it to the key solves the conflicts  The first part of the key is the datetime string formatted in a manner such that I can lexicographically compare two of them   if   handle   opendir              result   array        while  false       file   readdir  handle              if   file         amp  amp   file                         lastModified   date  F d Y  H i s  filemtime  file                if strlen  file -strpos  file   swf     4                    result  date  Y-m-d H i s  filemtime  file    file                          lt tr gt  lt td gt  lt input type   checkbox   name   box     gt  lt  td gt  lt td gt  lt a href    file   target    blank   gt  file lt  a gt  lt  td gt  lt td gt  lastModified lt  td gt  lt  tr gt                                      closedir  handle       krsort  result       echo implode      result

User · Answer

This would get all files in path to files with an  swf extension into an array and then sort that array by the file s mtime  files   glob  path to files   swf    usort  files  function  a   b        return filemtime  b  - filemtime  a        The above uses an Lambda function and requires PHP 5 3  Prior to 5 3  you would do usort  files  create function   a  b    return filemtime  b -filemtime  a        If you don t want to use an anonymous function  you can just as well define the callback as a regular function and pass the function name to usort instead  With the resulting array  you would then iterate over the files like this  foreach  files as  file       printf   lt tr gt  lt td gt  lt input type  quot checkbox quot  name  quot box   quot  gt  lt  td gt               lt td gt  lt a href  quot  1 s quot  target  quot  blank quot  gt  1 s lt  a gt  lt  td gt               lt td gt  2 s lt  td gt  lt  tr gt                  file     or basename  file  for just the filename w out path             date  F d Y  H i s   filemtime  file        Note that because you already called filemtime when sorting the files  there is no additional cost when calling it again in the foreach loop due to the stat cache

User · Answer

files   array diff scandir  dir SCANDIR SORT DESCENDING   array              print r  files

User · Answer

You need to put the files into an array in order to sort and find the last modified file    files   array    if   handle   opendir             while  false       file   readdir  handle              if   file         amp  amp   file                        files filemtime  file      file                      closedir  handle           sort     ksort  files          find the last modification      reallyLastModified   end  files        foreach  files as  file             lastModified   date  F d Y  H i s  filemtime  file            if strlen  file -strpos  file   swf     4              if   file     reallyLastModified                    do stuff for the real last modified file                         echo   lt tr gt  lt td gt  lt input type   checkbox   name   box     gt  lt  td gt  lt td gt  lt a href    file   target    blank   gt  file lt  a gt  lt  td gt  lt td gt  lastModified lt  td gt  lt  tr gt                        Not tested  but that s how to do it

[php] sort files by date in PHP

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