Disk Status with PHP (Total/Free/Used Space)

Source (DiskStatus.class.php)

<?php

/**
 * Disk Status Class
 *
 * http://pmav.eu/stuff/php-disk-status/
 *
 * v1.0 - 17/Oct/2008
 * v1.1 - 22/Ago/2009 (Exceptions added.)
 */

class DiskStatus {

  const RAW_OUTPUT = true;

  private $diskPath;


  function __construct($diskPath) {
    $this->diskPath = $diskPath;
  }


  public function totalSpace($rawOutput = false) {
    $diskTotalSpace = @disk_total_space($this->diskPath);

    if ($diskTotalSpace === FALSE) {
      throw new Exception('totalSpace(): Invalid disk path.');
    }

    return $rawOutput ? $diskTotalSpace : $this->addUnits($diskTotalSpace);
  }


  public function freeSpace($rawOutput = false) {
    $diskFreeSpace = @disk_free_space($this->diskPath);

    if ($diskFreeSpace === FALSE) {
      throw new Exception('freeSpace(): Invalid disk path.');
    }

    return $rawOutput ? $diskFreeSpace : $this->addUnits($diskFreeSpace);
  }


  public function usedSpace($precision = 1) {
    try {
      return round((100 - ($this->freeSpace(self::RAW_OUTPUT) / $this->totalSpace(self::RAW_OUTPUT)) * 100), $precision);
    } catch (Exception $e) {
      throw $e;
    }
  }


  public function getDiskPath() {
    return $this->diskPath;
  }


  private function addUnits($bytes) {
    $units = array( 'B', 'KB', 'MB', 'GB', 'TB' );

    for($i = 0; $bytes >= 1024 && $i < count($units) - 1; $i++ ) {
      $bytes /= 1024;
    }

    return round($bytes, 1).' '.$units[$i];
  }

}

?>

Example

<?php

/**
 * Disk Status Class - Example
 *
 * http://pmav.eu/stuff/php-disk-status/
 *
 * 22/Aug/2009
 */

require_once 'DiskStatus.class.php';

try {
  $diskStatus = new DiskStatus('c:');

  $freeSpace = $diskStatus->freeSpace();
  $totalSpace = $diskStatus->totalSpace();
  $barWidth = ($diskStatus->usedSpace()/100) * 400;

} catch (Exception $e) {
  echo 'Error ('.$e->getMessage().')';
  exit();
}

?>

<<? ?>?xml version="1.0" encoding="UTF-8"?<? ?>>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <style>
      body {
        font: bold 30px "Arial";
        letter-spacing: -1px;
      }

      .disk {
        border: 4px solid black;
        width: 400px;
        padding: 2px;
      }

      .used {
        display block;
        background: red;
        text-align: right;
        padding: 0 0 0 0;
      }
    </style>
    <title>Disk Status</title>
  </head>
  <body>
    <div class="disk">
      <div class="used" style="width: <?= $barWidth ?>px"><?= $diskStatus->usedSpace() ?>%&nbsp;</div>
    </div>
    Free: <?= $freeSpace ?> (of <?= $totalSpace ?>)
  </body>
</html>