PHP文件大小转换器[重复]

I need to convert random numbers into KB, MB, GB and TB. For example, if 2048 is generated, it needs to display as 2KB.

I am not sure where to start with this, except for generating a random number:

$number = rand(1,1000000);
echo $number;

Would really appreciate if someone pointed me to the right direction.

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You can round() and following may help you. I use this code in production for a long time.

function convert_bytes_to_hr_format($size){
    if (1024 > $size) {
        return $size.' B';
    } else if (1048576 > $size) {
        return round( ($size / 1024) , 2). ' KB';
    } else if (1073741824 > $size) {
        return round( (($size / 1024) / 1024) , 2). ' MB';
    } else if (1099511627776 > $size) {
        return round( ((($size / 1024) / 1024) / 1024) , 2). ' GB';
    }
}