How to force file download with PHP

Question

I want to require a file to be downloaded upon the user visiting a web page with PHP  I think it has something to do with file get contents  but am not sure how to execute it    url    http   example com go exe     After downloading a file with header location  it is not redirecting to another page  It just stops

User · Answer

you can use download attribute to force download a file   x000D   x000D   lt a href  https   test com aaa exe  download gt click here to download lt  a gt  x000D   x000D   x000D

User · Answer

In case you have to download a file with a size larger than the allowed memory limit  memory limit ini setting   which would cause the PHP Fatal error   Allowed memory size of 5242880 bytes exhausted error  you can do this      File to download   file     path to file       Maximum size of chunks  in bytes    maxRead   1   1024   1024     1MB     Give a nice name to your download   fileName    download file txt       Open a file in read mode   fh   fopen  file   r        These headers will force download on browser     and set the custom file name for the download  respectively  header  Content-Type  application octet-stream    header  Content-Disposition  attachment  filename       fileName             Run this until we have read the whole file     feof  eof means  end of file   returns  true  when the handler    has reached the end of file  while   feof  fh            Read and output the next chunk      echo fread  fh   maxRead           Flush the output buffer to free memory      ob flush          Exit to make sure not to output anything else  exit

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Read the docs about built-in PHP function readfile   file url    http   www myremoteserver com file exe   header  Content-Type  application octet-stream    header  Content-Transfer-Encoding  Binary     header  Content-disposition  attachment  filename       basename  file url            readfile  file url      Also make sure to add proper content type based on your file application zip  application pdf etc  - but only if you do not want to trigger the save-as dialog

User · Answer

You can stream download too which will consume significantly less resource  example    readableStream   fopen  test zip    rb     writableStream   fopen  php   output    wb     header  Content-Type  application octet-stream    header  Content-Disposition  attachment  filename  test zip     stream copy to stream  readableStream   writableStream   ob flush    flush      In the above example  I am downloading a test zip  which was actually the android studio zip on my local machine   php   output is a write-only stream  generally used by echo or print   after that  you just need to set the required headers and call stream copy to stream source  destination   stream copy to stream   method acts as a pipe which takes the input from the source stream  read stream  and pipes it to the destination stream  write stream  and it also avoid the issue of allowed memory exhausted so you can actually download files that are bigger than your PHP memory limit

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Display your file first and set its value into url   index php   lt a href  download php download    row  file      title  Download File  gt    download php   lt  php   db connectors   include  dbconfig php       function to set your files   function output file  file   name   mime type           if  is readable  file   die  File not found or inaccessible          size   filesize  file        name   rawurldecode  name        known mime types array           htm    gt   text html            exe    gt   application octet-stream            zip    gt   application zip            doc    gt   application msword            jpg    gt   image jpg            php    gt   text plain            xls    gt   application vnd ms-excel            ppt    gt   application vnd ms-powerpoint            gif    gt   image gif            pdf    gt   application pdf            txt    gt   text plain            html   gt   text html            png    gt   image png            jpeg   gt   image jpg              if  mime type                file extension   strtolower substr strrchr  file      1            if array key exists  file extension   known mime types                 mime type  known mime types  file extension             else                mime type  application force-download                          ob end clean        if ini get  zlib output compression        ini set  zlib output compression    Off        header  Content-Type       mime type       header  Content-Disposition  attachment  filename     name           header  Content-Transfer-Encoding  binary        header  Accept-Ranges  bytes         if isset   SERVER  HTTP RANGE                   list  a   range    explode       SERVER  HTTP RANGE   2           list  range    explode      range 2           list  range   range end    explode  -    range            range intval  range           if   range end                 range end  size-1            else                range end intval  range end                       new length    range end- range 1          header  HTTP 1 1 206 Partial Content            header  Content-Length   new length            header  Content-Range  bytes  range- range end  size          else            new length  size          header  Content-Length     size               chunksize   1  1024 1024        bytes send   0      if   file   fopen  file   r                  if isset   SERVER  HTTP RANGE             fseek  file   range            while  feof  file   amp  amp                connection aborted     amp  amp                bytes send lt  new length                                   buffer   fread  file   chunksize               echo  buffer               flush                 bytes send    strlen  buffer                     fclose  file         else         die  Error - can not open file         die      set time limit 0      set your folder    file path  uploads    your file      output must be folder yourfile    output file  file path      your file       row  type        back to index php while downloading   header  Location index php      gt

User · Answer

http   php net manual en function readfile php    That s all you need   Monkey gif  change to your file name  If you need to download from other server   monkey gif  change to  http   www exsample com go exe

User · Answer

The following code is a correct way of implementing a download service in php as explained in the following tutorial  header  Content-Type  application zip    header  Content-Disposition  attachment  filename    file name      set time limit 0    file    fopen  filePath   rb    while  feof  file         print  fread  file  1024 8        ob flush        flush

User · Answer

The answers above me works  But  I d like to contribute a method on how to perform it using GET  on your html php page   File    some dir file jpg    lt a href   lt  php echo     sumdir download php f    File    gt   target   blank  gt Download lt  a gt    and download php contains   file     GET  f      header  Expires  0    header  Last-Modified      gmdate  D  d M Y H i s       GMT    header  Cache-Control  no-store  no-cache  must-revalidate    header  Cache-Control  post-check 0  pre-check 0   false   header  Pragma  no-cache      ext   pathinfo  file  PATHINFO EXTENSION    basename   pathinfo  file  PATHINFO BASENAME    header  Content-type  application    ext   header  Content-length    filesize  file    header  Content-Disposition  attachment  filename    basename      ob clean     flush    readfile  file   exit    this should work on any file types  this is not tested using POST  but it could work

User · Answer

A modification of the accepted answer above  which also detects the MIME type in runtime    finfo   finfo open FILEINFO MIME TYPE   header  Content-Type    finfo file  finfo   path      finfo   finfo open FILEINFO MIME ENCODING   header  Content-Transfer-Encoding    finfo file  finfo   path      header  Content-disposition  attachment  filename    basename  path         readfile  path      do the double-download-dance  dirty but worky

User · Answer

header  Content-Type  application octet-stream    header  Content-Transfer-Encoding  Binary    header  Content-disposition  attachment  filename   file exe       echo readfile  url     is correct  or better one for exe type of files  header  Location   url

User · Answer

lt  php  file    http   example com go exe     header  Content-Description  File Transfer     header  Content-Type  application octet-stream     header  Content-Disposition  attachment  filename      basename  file            readfile   file   exit       gt    Or  when the file is not openable with the browser  you can just use the Location header    lt  php header  Location  http   example com go exe      gt

User · Answer

try this   header  Content-type  audio mp3     header  Content-disposition  attachment   filename       trackname                                     readfile  folder name     trackname             exit

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