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gbot on 07/04/08

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Last Edited at 07/04/08 06:32am

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PHP - Size converter

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/**
 * Get the human-readable size for an amount of bytes
 * @param int  $size      : the number of bytes to be converted
 * @param int $precision  : number of decimal places to round to;
 *                          optional - defaults to 2
 * @param bool $long_name : whether or not the returned size tag should
 *                          be unabbreviated (ie "Gigabytes" or "GB");
 *                          optional - defaults to true
 * @param bool $real_size : whether or not to use the real (base 1024)
 *                          or commercial (base 1000) size;
 *                          optional - defaults to true
 * @return string         : the converted size
 */
function get_size($size,$precision=2,$long_name=true,$real_size=true) {
   $base=$real_size?1024:1000;
   $pos=0;
   while ($size>$base) {
      $size/=$base;
      $pos++;
   }
   $prefix=get_size_prefix($pos);
   $size_name=$long_name?$prefix."bytes":$prefix[0].'B';
   return round($size,$precision).' '.ucfirst($size_name);
}
/**
 * @param int $pos : the distence along the metric scale relitive to 0
 * @return string  : the prefix
 */
function get_size_prefix($pos) {
   switch ($pos) {
      case 00: return "";
      case 01: return "kilo";
      case 02: return "mega";
      case 03: return "giga";
      case 04: return "tera";
      case 05: return "peta";
      case 06: return "exa";
      case 07: return "zetta";
      case 08: return "yotta";
      case 09: return "xenna";
      case 10: return "w-";
      case 11: return "vendeka";
      case 12: return "u-";
      default: return "?-";
   }
}