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

One more solution (IEC):

<?php

class Filesize
{
    const UNIT_PREFIXES_POWERS = [
        'B' => 0,
        ''  => 0,
        'K' => 1,
        'k' => 1,
        'M' => 2,
        'G' => 3,
        'T' => 4,
        'P' => 5,
        'E' => 6,
        'Z' => 7,
        'Y' => 8,
    ];

    public static function humanize($size, int $precision = 2, bool $useBinaryPrefix = false)
    {
        $base = $useBinaryPrefix ? 1024 : 1000;
        $limit = array_values(self::UNIT_PREFIXES_POWERS)[count(self::UNIT_PREFIXES_POWERS) - 1];
        $power = ($_ = floor(log($size, $base))) > $limit ? $limit : $_;
        $prefix = array_flip(self::UNIT_PREFIXES_POWERS)[$power];
        $multiple = ($useBinaryPrefix ? strtoupper($prefix) . 'iB' : $prefix . 'B');
        return round($size / pow($base, $power), $precision) . $multiple;
    }

    // ...
}

Source:

https://github.com/mingalevme/utils/blob/master/src/Filesize.php https://github.com/mingalevme/utils/blob/master/tests/FilesizeTest.php

Answer 2

function toByteSize($p_sFormatted) {
    $aUnits = array('B'=>0, 'KB'=>1, 'MB'=>2, 'GB'=>3, 'TB'=>4, 'PB'=>5, 'EB'=>6, 'ZB'=>7, 'YB'=>8);
    $sUnit = strtoupper(trim(substr($p_sFormatted, -2)));
    if (intval($sUnit) !== 0) {
        $sUnit = 'B';
    }
    if (!in_array($sUnit, array_keys($aUnits))) {
        return false;
    }
    $iUnits = trim(substr($p_sFormatted, 0, strlen($p_sFormatted) - 2));
    if (!intval($iUnits) == $iUnits) {
        return false;
    }
    return $iUnits * pow(1024, $aUnits[$sUnit]);
}