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@ 2014-09-26T22:13:22Z

<?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);

Output
Performance
VLD
References
Branches

round: documentation ( source)
floor: documentation ( source)
log: documentation ( source)
pow: documentation ( source)

preferences:dark modelive preview

41.14 ms | 402 KiB | 5 Q