3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $size = 50000000000; function file_size($size) { $filesizename = array(" Bytes", " KB", " MB", " GB", " TB", " PB", " EB", " ZB", " YB"); return $size ? round($size/pow(1024, ($i = floor(log($size, 1024)))), 2) . $filesizename[$i] : '0 Bytes'; } echo file_size($size);
based on KoDgN
Output for 4.3.0 - 7.2.0
46.57 GB