PHP使用适合阅读的格式显示文件大小的方法

// A much better and accurate version can be found
// in Aidan's PHP Repository:
// http://aidanlister.com/repos/v/function.size_readable.php
/**
?* Returns a human readable filesize
?*
?* @author????? wesman20 (php.net)
?* @author????? Jonas John
?* @version???? 0.3
?* @link??????? http://www.jonasjohn.de/snippets/php/readable-filesize.htm
?*/
function HumanReadableFilesize($size) {
??? // Adapted from: http://www.php.net/manual/en/function.filesize.php
??? $mod = 1024;
??? $units = explode(' ','B KB MB GB TB PB');
??? for ($i = 0; $size > $mod; $i++) {
??????? $size /= $mod;
??? }
??? return round($size,2) . ' ' . $units[$i];
}