PHP convert KB MB GB TB etc to Bytes

Question

I\'m asking how to convert KB MB GB TB & co. into bytes.
For example:

byteconvert(\"10KB\") // => 10240
byteconvert(\"10.5KB\") // =>          


        

Answer 1

I use a function to determine the memory limit set for PHP in some cron scripts that looks like:

$memoryInBytes = function ($value) {
    $unit = strtolower(substr($value, -1, 1));
    return (int) $value * pow(1024, array_search($unit, array(1 =>'k','m','g')));
}

A similar approach that will work better with floats and accept the two letter abbreviation would be something like:

function byteconvert($value) {
    preg_match('/(.+)(.{2})$/', $value, $matches);
    list($_,$value,$unit) = $matches;
    return (int) ($value * pow(1024, array_search(strtolower($unit), array(1 => 'kb','mb','gb','tb'))));
}