1<?php 2 3namespace Drupal\Component\Utility; 4 5/** 6 * Provides helper methods for byte conversions. 7 */ 8class Bytes { 9 10 /** 11 * The number of bytes in a kilobyte. 12 * 13 * @see http://wikipedia.org/wiki/Kilobyte 14 */ 15 const KILOBYTE = 1024; 16 17 /** 18 * Parses a given byte size. 19 * 20 * @param mixed $size 21 * An integer or string size expressed as a number of bytes with optional SI 22 * or IEC binary unit prefix (e.g. 2, 3K, 5MB, 10G, 6GiB, 8 bytes, 9mbytes). 23 * 24 * @return int 25 * An integer representation of the size in bytes. 26 */ 27 public static function toInt($size) { 28 // Remove the non-unit characters from the size. 29 $unit = preg_replace('/[^bkmgtpezy]/i', '', $size); 30 // Remove the non-numeric characters from the size. 31 $size = preg_replace('/[^0-9\.]/', '', $size); 32 if ($unit) { 33 // Find the position of the unit in the ordered string which is the power 34 // of magnitude to multiply a kilobyte by. 35 return round($size * pow(self::KILOBYTE, stripos('bkmgtpezy', $unit[0]))); 36 } 37 else { 38 // Ensure size is a proper number type. 39 return round((float) $size); 40 } 41 } 42 43} 44