BytesViewHelper.php

<?php
namespace TYPO3\Fluid\ViewHelpers\Format;

/*                                                                        *
 * This script belongs to the TYPO3 Flow package "Fluid".                 *
 *                                                                        *
 * It is free software; you can redistribute it and/or modify it under    *
 * the terms of the GNU Lesser General Public License, either version 3   *
 * of the License, or (at your option) any later version.                 *
 *                                                                        *
 * The TYPO3 project - inspiring people to share!                         *
 *                                                                        */

use TYPO3\Flow\Annotations as Flow;
use TYPO3\Flow\I18n;
use TYPO3\Fluid\Core\ViewHelper;

/**
 * Formats an integer with a byte count into human-readable form.
 *
 * = Examples =
 *
 * <code title="Defaults">
 * <f:format.bytes>{filesize}</f:format.date>
 * </code>
 * <output>
 * 123KB
 * </output>
 *
 * @api
 */
class BytesViewHelper extends \TYPO3\Fluid\Core\ViewHelper\AbstractViewHelper {

	/**
	 * @var array
	 */
	protected $units = array('B', 'KB', 'MB', 'GB', 'TB', 'EB', 'ZB', 'YB');

	/**
	 * Render the supplied byte count as a human readable string.
	 *
	 * @param integer $decimals The number of digits after the decimal point
	 * @param string $decimalSeparator The decimal point character
	 * @param string $thousandsSeparator The character for grouping the thousand digits
	 * @return string Formatted byte count
	 * @throws \TYPO3\Fluid\Core\ViewHelper\Exception
	 * @api
	 */
	public function render($decimals = 1, $decimalSeparator = '.', $thousandsSeparator = ',') {
		$bytes = max((integer)$this->renderChildren(), 0);
		$pow = floor(($bytes ? log($bytes) : 0) / log(1024));
		$pow = min($pow, count($this->units) - 1);
		$bytes /= (1 << (10 * $pow));

		return sprintf(
			'%s %s',
			number_format(round($bytes, 4 * $decimals), $decimals, $decimalSeparator, $thousandsSeparator),
			$this->units[$pow]
		);
	}

}

?>