extract mp3 info with php and rename file on linux box

how to get all mp3 info from a file with php and rename based on this tags

download complete file (rename to .php after): mp3-getinfo-tags-rename-php.txt

<?php
clearstatcache();

/*
%f     Filename without the path [string]
%F     Filename with the path [string]
%k     File size in KB [integer]
%a     Artist [string]
%c     Comment [string]
%g     Musical genre [string]
%G     Musical genre number [integer]
%l     Album name [string]
%n     Track [integer]
%t     Track Title [string]
%y     Year [string]
%C     Copyright flag [string]
%e     Emphasis [string]
%E     CRC Error protection [string]
%L     MPEG Layer [string]
%O     Original material flag [string]
%o     Stereo/mono mode [string]
%p     Padding [string]
%v     MPEG Version [float]
%u     Number of good audio frames [integer]
%b     Number of corrupt audio frames [integer]
%Q     Sampling frequency in Hz [integer]
%q     Sampling frequency in kHz [integer]
%r     Bit  Rate  in  kbps  (type  and meaning affected by -r option)
%m     Playing time: minutes only [integer]
%s     Playing time: seconds only [integer] (usually used  in conjunction with %m)
%S     Total playing time in seconds [integer]
%%     A single percent sign
*/


// my mp3 directory to recusively iterate thrue
$directory = '/mnt/temp/teachings';

// what info i want from my mp3 file - tags
$info = [
  'artist' => '%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;
}


		
		
		

			
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