John

<?

global $mp3s,$i,$j,$b,$perc_t;

// **********************************************************************
// VARS
// **********************************************************************

$mp3s = array ();
$mp3dir = "F://mp3";
$targetdir = "C://apps//test//";
//$maxsize = 50000000; // 50 mb
$maxsize = 500000000; // 500 mb
//$maxsize = 6000000000; // 6000 mb
$i=0;
$j=0;
$b=0;
$totalsize=0;
$perc_t=0;
$m=0;

// **********************************************************************
// FUNCTIONS
// **********************************************************************

function read_dir($dir) {
  global $mp3s,$i,$j,$b;
  $d = dir($dir);
  while (false !== ($entry = $d->read())) {
    if ($entry[0] != ".") {
      if (is_dir($dir."//".$entry)) {
        read_dir($dir."//".$entry);
      } else {
        if (substr($entry,strlen($entry)-3,3) == "mp3") {
          $mp3s[$i]['dir'] = $dir."//";
          $mp3s[$i]['filename'] = $entry;
          $mp3s[$i]['filesize'] = @filesize($dir."//".$entry);
          $b = $b + $mp3s[$i]['filesize'];
          $i++;
        } else {
          $j++;
        }
      }
    }
  }
}

function print_perc($perc) {
  global $perc_t;
  $step=5;
  if ($perc > $perc_t) {
    $perc_t += $step;
    return $perc . "%\n";
  }
}

// **********************************************************************
// MAIN PROGRAM
// **********************************************************************

// READ MP3 FILES
if (is_dir($mp3dir)) {
  read_dir($mp3dir);
}

// SEARCH INFORMATION
echo "A total of " . $i . " mp3 files are found\n";
echo "Also, " . $j . " other files were found, bringing a total of " . ($i+$j) . " files\n";
echo "Total mp3 size is " . $b . " bytes\n";
echo "Average mp3 filesize is " . round($b/$i,0) . " bytes\n";
echo "Targetdir limit is " . $maxsize . " bytes\n";
echo "Checking for disk space ... ";
if (disk_free_space($targetdir) > $maxsize) {
  echo "OK\n";
} else {
  $maxsize = disk_free_space($targetdir) - 1000;
  echo "WARNING, not enough disk space. Setting maxsize to " . $maxsize . "\n";
}
echo "Estimate number of mp3 files that will be copied is " . round($maxsize/($b/$i)) . "\n";


// COPY MP3 FILES
while ($totalsize < $maxsize) {
  $n = rand(0,$i);
  if (($totalsize+$mp3s[$n]['filesize']) < $maxsize) {
    //copy($mp3s[$n]['dir'].$mp3s[$n]['filename'],$targetdir.$mp3s[$n]['filename']);
    $totalsize += $mp3s[$n]['filesize'];
    // calculate %
    echo print_perc (round($totalsize / $maxsize * 100,0));
    $m++;
  } else {
    $totalsize += $mp3s[$n]['filesize'];
  }
}

echo $m . " mp3 files copied to " . $targetdir . "\n";

?>