'%a', 'year' => '%y', 'comment' => '%c', 'album_name' => '%l', 'track' => '%n', 'track_title' => '%t', 'minutes' => '%m', 'seconds' => '%s', ]; // what my filename will looks like $fileFormat = '%artist-%year-%comment-%album_name-%track-M%minutesS%seconds.mp3'; // build format usable for shell and use newline as delimiter $infoParam = implode('\n', $info); // what this can be... print '

';

// scan folders
$rdit = new RecursiveDirectoryIterator($directory);
foreach (new RecursiveIteratorIterator($rdit) as $file) {

    // do the job only for files & mp3 ext
    if($file->isFile() && strtolower($file->getExtension()) == 'mp3') {

        // get me the id3 tags (mp3info v1 on my debian)
        $mp3Info = shell_exec('mp3info -p "' . $infoParam . '" ' . $file);

        // is the info what i expect?
        $mp3InfoArray = explode("\n", $mp3Info);
        if(sizeof($mp3InfoArray) != sizeof($info)) {
            print "check:$file
";
            continue;
        }

        // make me array with combined $info keys and mp3 info values
        $mp3InfoArray = array_combine(array_flip($info), $mp3InfoArray);

        // build new filename
        $newFile = sprintfa($fileFormat, $mp3InfoArray);

        // clean a bit
        $newFile = str_replace([',', '\\', ' ', '/', '%'], '_', $newFile);
        $newFile = str_replace(['&'], ['and'], $newFile);
        $newFile = iconv('UTF-8', 'ASCII//TRANSLIT', utf8_encode($newFile));;
        $newFile = $file->getPath() . '/' . $newFile;

        // is the new file equal to the old filename?
        if(strcmp($file, $newFile) != 0) {
            // does the newfile already exists?
            if(file_exists($newFile)) {
                $newFile = substr_replace($newFile, uniqid('-') . '.mp3',-4, 4);
            }
            rename($file,  $newFile);

            // what we did with old to new file
            print "$file:$newFile
";
            flush();
        }
    }
}

function sprintfa ($format, array $values)
{
    foreach ((array)$values as $k => $v) {
            $format = str_replace("%$k", $v, $format);
    }
    return $format;
}