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Help With Sorting a Foreach loop into Outputting in a Particular Order

Posted on 2009-05-15
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Last Modified: 2012-05-07
I have a file uploader in my forum, for people to upload albums they have written. I have modified Uber Uploader (a progress bar script) to my needs for this usage. After upload is complete i have it writing an xspf playlist file for an audio player from the mp3 files it finds. My problem is uber uploader has a random (well, i cant find how it does it) way of cycling through its uploaded filelist and does not follow the upload order in its output end. This means my xspf playlist file is not created with the correct track order for the album.

I have now included getid3 so that I can grab id3 data from the mp3. How can I make the foreach loop output the stringdata for the xspf in order of the track field getid3 finds? 1,2,3,4,5 sequentially.

Code below shows what I have working:
function createxspfplayer($_FILE_DATA, $_CONFIG_DATA, $_POST_DATA)
 
{
  
include('../../getid3/getid3.php');
 
$mp3pattern = '/.mp3/i';
$xspffile = $_CONFIG_DATA['absolute_path'] . $_CONFIG_DATA['upload_id'] . ".xspf";
$xspfurl = $_CONFIG_DATA['path_to_upload'] . $_CONFIG_DATA['upload_id'] . ".xspf";
$fh = fopen($xspffile, 'w') or die("can't open file");
 
$stringData = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<playlist version=\"0\" xmlns=\"http://xspf.org/ns/0/\">
   <trackList>";
 
fwrite($fh, $stringData);
 
 
 
foreach($_FILE_DATA as $slot => $value){
		$file_slot = $_FILE_DATA[$slot]->getFileInfo('slot');
		$file_name = $_FILE_DATA[$slot]->getFileInfo('name');
                    if($file_size > 0){
 
                            $file_path = $_CONFIG_DATA['path_to_upload'] . $file_name;
 
                          if (preg_match($mp3pattern, $file_name))
                           {
 
                           $getID3 = new getID3;
                           $mp3path = $_CONFIG_DATA['absolute_path'] . $file_name;
                           $mp3info = $getID3->analyze($mp3path);
                           getid3_lib::CopyTagsToComments($mp3info);
 
// @$mp3Info['comments_html']['track'][0] would give me the track number from the mp3, obviously a new/different type of loop must be created to sort, this is what i am asking for help with
 
                           $stringData = "<track>
                           <location>" . $file_path . "</location>
                           <info>" . $file_path . "</info>
                           <title>" . @$mp3info['comments_html']['track'][0] . " " . @$mp3info['tags']['id3v2']['title'][0] . " " . @$mp3info['playtime_string'] . "</title>
                           <link>http://www.aiwazz.com/mdp/</link>
                           </track>";
 
                           fwrite($fh, $stringData);
                           }
 
		}
		else{ echo '' . $file_name . ' <span class="ubrError">Failed To Upload</span>'; }
 
  }
$stringData = "</trackList>
</playlist>";
 
fwrite($fh, $stringData);
 
fclose($fh);

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Question by:aiwazz
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5 Comments
 
LVL 19

Expert Comment

by:Michael701
ID: 24397047
my thought is to first loop through and build an array by_track[], use ksort then do a foreach on this

$by_track[ mp3Info['comments_html']['track'][0] ] = $slot;

do you need more code?
0
 

Author Comment

by:aiwazz
ID: 24397368
Thank you for taking a look! Admittedly i am no php wiz, just getting going... A little more code would be of great benefit if you have the time to share it. I can understand the gist of were you went but might stumble implementing (havent used php's sort function before). I am at work and will be home in 2 hours to test my code.

I really appreciate your time, thanks again!
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LVL 19

Accepted Solution

by:
Michael701 earned 500 total points
ID: 24397853
untested code, but try this.
<?php
function createxspfplayer($_FILE_DATA, $_CONFIG_DATA, $_POST_DATA)
 
{
  
include('../../getid3/getid3.php');
 
$mp3pattern = '/.mp3/i';
$xspffile = $_CONFIG_DATA['absolute_path'] . $_CONFIG_DATA['upload_id'] . ".xspf";
$xspfurl = $_CONFIG_DATA['path_to_upload'] . $_CONFIG_DATA['upload_id'] . ".xspf";
$fh = fopen($xspffile, 'w') or die("can't open file");
 
$stringData = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<playlist version=\"0\" xmlns=\"http://xspf.org/ns/0/\">
   <trackList>";
 
fwrite($fh, $stringData);
 
foreach($_FILE_DATA as $slot => $value)
{
  $file_slot = $_FILE_DATA[$slot]->getFileInfo('slot');
  $file_name = $_FILE_DATA[$slot]->getFileInfo('name');
  if(filesize($_CONFIG_DATA['absolute_path'] . $file_name) > 0) // $file_size was not set
  {
    $file_path = $_CONFIG_DATA['path_to_upload'] . $file_name;
 
    if (preg_match($mp3pattern, $file_name))
    {
      $getID3 = new getID3;
      $mp3path = $_CONFIG_DATA['absolute_path'] . $file_name;
      $mp3info = $getID3->analyze($mp3path);
      getid3_lib::CopyTagsToComments($mp3info);
       
      $by_track[ mp3Info['comments_html']['track'][0] ] = $slot;
    }
  }
}
 
ksort($by_track);
reset($by_track); // resets foreach pointer to the begining of the array
 
foreach($by_track as $track => $slot){
                $file_slot = $_FILE_DATA[$slot]->getFileInfo('slot');
                $file_name = $_FILE_DATA[$slot]->getFileInfo('name');
                    if($file_size > 0){
 
                            $file_path = $_CONFIG_DATA['path_to_upload'] . $file_name;
 
                          if (preg_match($mp3pattern, $file_name))
                           {
 
                           $getID3 = new getID3;
                           $mp3path = $_CONFIG_DATA['absolute_path'] . $file_name;
                           $mp3info = $getID3->analyze($mp3path);
                           getid3_lib::CopyTagsToComments($mp3info);
 
// @$mp3Info['comments_html']['track'][0] would give me the track number from the mp3, obviously a new/different type of loop must be created to sort, this is what i am asking for help with
 
                           $stringData = "<track>
                           <location>" . $file_path . "</location>
                           <info>" . $file_path . "</info>
                           <title>" . @$mp3info['comments_html']['track'][0] . " " . @$mp3info['tags']['id3v2']['title'][0] . " " . @$mp3info['playtime_string'] . "</title>
                           <link>http://www.aiwazz.com/mdp/</link>
                           </track>";
 
                           fwrite($fh, $stringData);
                           }
 
                }
                else{ echo '' . $file_name . ' <span class="ubrError">Failed To Upload</span>'; }
 
  }
$stringData = "</trackList>
</playlist>";
 
fwrite($fh, $stringData);
 
fclose($fh);
?>

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Author Comment

by:aiwazz
ID: 24398612
Just a little bit of fix, thanks for pointing out my missed bit on the filesize...

You rock. I thank you.

here's the final working code:
function createxspfplayer($_FILE_DATA, $_CONFIG_DATA, $_POST_DATA)
 
{
  
include('/path/to/getid3/getid3.php');
 
$mp3pattern = '/.mp3/i';
$jpgpattern = '/.jpg/i';
$jpegpattern = '/.jpeg/i';
$space = ' ';
$underscore = '/_/i';
$xspffile = $_CONFIG_DATA['absolute_path'] . $_CONFIG_DATA['upload_id'] . ".xspf";
$xspfurl = $_CONFIG_DATA['path_to_upload'] . $_CONFIG_DATA['upload_id'] . ".xspf";
$fh = fopen($xspffile, 'w') or die("can't open file");
 
$stringData = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<playlist version=\"0\" xmlns=\"http://xspf.org/ns/0/\">
   <trackList>";
 
fwrite($fh, $stringData);
 
foreach($_FILE_DATA as $slot => $value){
		$fname = $_FILE_DATA[$slot]->getFileInfo('name');
                               if (preg_match($jpgpattern, $fname)) {
                         $imglink = $_CONFIG_DATA['path_to_upload'] . $fname;
                    }
                    elseif (preg_match($jpegpattern, $fname)) {
                         $imglink = $_CONFIG_DATA['path_to_upload'] . $fname;
                    }
 
  }
 
foreach($_FILE_DATA as $slot => $value)
{
  $file_slot = $_FILE_DATA[$slot]->getFileInfo('slot');
  $file_name = $_FILE_DATA[$slot]->getFileInfo('name');
  $file_size = $_FILE_DATA[$slot]->getFileInfo('size');
  if($file_size > 0)
  {
    $file_path = $_CONFIG_DATA['path_to_upload'] . $file_name;
 
    if (preg_match($mp3pattern, $file_name))
    {
      $getID3 = new getID3;
      $mp3path = $_CONFIG_DATA['absolute_path'] . $file_name;
      $mp3info = $getID3->analyze($mp3path);
      getid3_lib::CopyTagsToComments($mp3info);
       
      $by_track[ @$mp3info['comments_html']['track'][0] ] = $slot;
    }
  }
}
 
ksort($by_track);
reset($by_track); // resets foreach pointer to the begining of the array
 
foreach($by_track as $track => $slot){
                $file_slot = $_FILE_DATA[$slot]->getFileInfo('slot');
                $file_name = $_FILE_DATA[$slot]->getFileInfo('name');
                $file_size = $_FILE_DATA[$slot]->getFileInfo('size');
                    if($file_size > 0){
 
                            $file_path = $_CONFIG_DATA['path_to_upload'] . $file_name;
 
                          if (preg_match($mp3pattern, $file_name))
                           {
 
                           $getID3 = new getID3;
                           $mp3path = $_CONFIG_DATA['absolute_path'] . $file_name;
                           $mp3info = $getID3->analyze($mp3path);
                           getid3_lib::CopyTagsToComments($mp3info);
 
                           $stringData = "<track>
                           <location>" . $file_path . "</location>
                           <info>" . $file_path . "</info>
                           <title>" . @$mp3info['comments_html']['track'][0] . " " . @$mp3info['tags']['id3v2']['title'][0] . " " . @$mp3info['playtime_string'] . "</title>
                           <image>";
                           fwrite($fh, $stringData);
 
                           if (isset($imglink))
                           {
                             $stringData = $imglink;
                             fwrite($fh, $stringData);
                             }
 
                           $stringData = "</image>
 
                           <link></link>
                           </track>";
 
                           fwrite($fh, $stringData);
                           }
 
                }
                else{ echo '' . $file_name . ' <span class="ubrError">Failed To Upload</span>'; }
 
  }
$stringData = "</trackList>
</playlist>";
 
fwrite($fh, $stringData);
 
fclose($fh);

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Author Closing Comment

by:aiwazz
ID: 31581970
perfect, thank you so much!
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