note 87285 deleted from function.filesize by danbrown

Note Submitter: xnavigator ---- if I use the func of olafurw and d.abromeit echo byteConvert(100); // output: 100.00 B And because we don't need of that .00 this is the correct func: <?php function byteConvert( $bytes ) { if ($bytes<=0) return '0 Byte'; $convention=1000; //[1000->10^x|1024->2^x] $s=array('B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB'); $e=floor(log($bytes,$convention)); return round($bytes/pow($convention,$e),2).' '.$s[$e]; } ?> you can simply switch from 10^x to 2^x changing $convention; this func is a little faster because $e is calculated with only a log function