Pony.fm/app/library/Helpers.php

<?php

	class Helpers {
		/**
		 * Removes whitespace and special characters from a string
		 * and sets all characters to lower case.
		 */
		public static function sanitizeInputForHashing($value) {
			$value = preg_replace('/[^A-Za-z0-9]/', '', $value);
			return strtolower($value);
		}

		public static function template($template) {
			echo file_get_contents('templates/' . $template);
		}

		public static function angular($expression) {
			return '{{' . $expression . '}}';
		}

		public static function formatBytes($bytes, $precision = 2) {
			if ($bytes == 0)
				return '0 MB';

			$units = array('B', 'KB', 'MB', 'GB', 'TB');

			$bytes = max($bytes, 0);
			$pow = floor(($bytes ? log($bytes) : 0) / log(1024));
			$pow = min($pow, count($units) - 1);

			$bytes /= pow(1024, $pow);

			return round($bytes, $precision) . ' ' . $units[$pow];
		}

		/**
		 * timeago-style timestamp generator macro.
		 *
		 * @param string $timestamp A timestamp in SQL DATETIME syntax
		 * @return string
		 */
		public static function timestamp( $timestamp ) {
			if(gettype($timestamp) !== 'string' && get_class($timestamp) === 'DateTime'){
				$timestamp = $timestamp->format('c');
			}

			$title = date('c', strtotime($timestamp));
			$content = date('F d, o \@ g:i:s a', strtotime($timestamp));
			return '<abbr class="timeago" title="'.$title.'">'.$content.'</abbr>';
		}
	}