PHP convert KB MB GB TB etc to Bytes

Question

I\'m asking how to convert KB MB GB TB & co. into bytes.
For example:

byteconvert(\"10KB\") // => 10240
byteconvert(\"10.5KB\") // =>          


        

Answer 1

Here's what I've come up with so far, that I think is a much more elegant solution:

/**
 * Converts a human readable file size value to a number of bytes that it
 * represents. Supports the following modifiers: K, M, G and T.
 * Invalid input is returned unchanged.
 *
 * Example:
 * 
 * $config->human2byte(10);          // 10
 * $config->human2byte('10b');       // 10
 * $config->human2byte('10k');       // 10240
 * $config->human2byte('10K');       // 10240
 * $config->human2byte('10kb');      // 10240
 * $config->human2byte('10Kb');      // 10240
 * // and even
 * $config->human2byte('   10 KB '); // 10240
 * 
 *
 * @param number|string $value
 * @return number
 */
public function human2byte($value) {
  return preg_replace_callback('/^\s*(\d+)\s*(?:([kmgt]?)b?)?\s*$/i', function ($m) {
    switch (strtolower($m[2])) {
      case 't': $m[1] *= 1024;
      case 'g': $m[1] *= 1024;
      case 'm': $m[1] *= 1024;
      case 'k': $m[1] *= 1024;
    }
    return $m[1];
  }, $value);
}