MP3s durchnummerieren

#!/usr/bin/php4
< ?php
///////////////////////////////////////////////////////////
// tagtracks.php - a quick hack
//
// Adds a tracknumber to your MP3s. Even if your MP3s are 
// well tagged, often the tracknumber is missing. This 
// script sets a tracknumber based on the order of the
// filenames.
// This script handles only the first level of the given
// directory, your directory structure must look like this:
//
// /path/to/your/mp3s/
// /path/to/your/mp3s/Artist1 - Album1/*.mp3
// /path/to/your/mp3s/Artist1 - Album2/*.mp3
// /path/to/your/mp3s/Artist2 - Album1/*.mp3
//
// There is no support for recursion (yet).
//
// Usage:
// - install pear MP3_ID package
// - adopt cgi-path (first line), Id.php path and MP3_DIR
//   constant (should point to your main MP3-Dir)
// - consider a "dry run": comment the line
//   $mp3->write();
//   and look what tagtracks.php would do
// - run tagtracks.php from commandline
//
// Questions? Drop me a note: melle (at) gmx /d0t/ at
//
// Known Bugs:
// - does not work recursive
// - no error checking...
 
// you need the MP3_ID package from pear repository
// see http://pear.php.net/package/MP3_ID
require_once 'MP3/Id.php';
 
// location of the mp3 collection
define("MP3_DIR", "/mnt/storage3/music/mp3/");
 
// return true if $str ends with $sub
function endsWith( $str, $sub )
{
   return ( substr( $str, strlen( $str ) - strlen( $sub ) ) == $sub );
}
 
// tags one directory
function tag_directory($path)
{
    echo "Tagging: " . $path . "\n";
 
    // holds all mp3 filenames of the directory
    $arr = array();
 
    // lookup all files in the given directory
    $d = dir($path);
    while (false !== ($entry = $d->read()))
    {
        if (   is_file($path . '/' .$entry)
            && (   endsWith($entry, "MP3")
                || endsWith($entry, "mp3")))
        {
            // check for possible track number in filename
            // if this test fails, you must sort the files
            // yourself.
            if (!ereg("[0-9][0-9]",$entry))
            {
                echo "NOT SORTED: " .$path . "\n";
                return;
            }
 
            // add filename to our array
            $arr[] = $entry;
        }
    }
    $d->close();
 
    // sort filenames
    sort($arr);
 
    // write tracknumber tag ordered by filename
    foreach ($arr as $i => $filename)
    {
        $mp3 = new MP3_Id();
        $mp3->read($path . '/' . $filename);
 
        $trackno = $mp3->getTag("track");
        echo "Track [".$trackno."] " . $filename . "\n";
 
        if (   0  > $trackno
            || 99 < $trackno
            || "" == $trackno)
        {
                $mp3->setTag("track", $i+1);
                $mp3->write();
                echo "Write [".($i+1)."] " . $filename . "\n";
        }
    }
}
 
// open MP3 location and tag all subdirectories
$d = dir(MP3_DIR);
while (false !== ($entry = $d->read()))
{
    if (is_dir(MP3_DIR . $entry))
    {
        tag_directory(MP3_DIR . $entry);
    }
}
$d->close();
 
?>