PHP Filesize Mb/Kb Conversion

PHP filesize MB/KB conversion

Here is a sample:

<?php
// Snippet from PHP Share: http://www.phpshare.org

    function formatSizeUnits($bytes)
    {
        if ($bytes >= 1073741824)
        {
            $bytes = number_format($bytes / 1073741824, 2) . ' GB';
        }
        elseif ($bytes >= 1048576)
        {
            $bytes = number_format($bytes / 1048576, 2) . ' MB';
        }
        elseif ($bytes >= 1024)
        {
            $bytes = number_format($bytes / 1024, 2) . ' KB';
        }
        elseif ($bytes > 1)
        {
            $bytes = $bytes . ' bytes';
        }
        elseif ($bytes == 1)
        {
            $bytes = $bytes . ' byte';
        }
        else
        {
            $bytes = '0 bytes';
        }

        return $bytes;
}
?>

Format bytes to kilobytes, megabytes, gigabytes

function formatBytes($bytes, $precision = 2) { 
    $units = array('B', 'KB', 'MB', 'GB', 'TB'); 

    $bytes = max($bytes, 0); 
    $pow = floor(($bytes ? log($bytes) : 0) / log(1024)); 
    $pow = min($pow, count($units) - 1); 

    // Uncomment one of the following alternatives
    // $bytes /= pow(1024, $pow);
    // $bytes /= (1 << (10 * $pow)); 

    return round($bytes, $precision) . ' ' . $units[$pow]; 
} 

(Taken from php.net, there are many other examples there, but I like this one best :-)

PHP file size converter

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';
    }
}

How to Convert File size to only Megabytes using PHP

just divide by 1024*1024

<?php
function get_mb($size) {
    return sprintf("%4.2f MB", $size/1048576);
}

$file_path = "pic1.jpg";

$file_size = get_mb(filesize($file_path));

echo $file_size;

?>

PHP convert KB MB GB TB etc to Bytes

Here's a function to achieve this:

function convertToBytes(string $from): ?int {
    $units = ['B', 'KB', 'MB', 'GB', 'TB', 'PB'];
    $number = substr($from, 0, -2);
    $suffix = strtoupper(substr($from,-2));

    //B or no suffix
    if(is_numeric(substr($suffix, 0, 1))) {
        return preg_replace('/[^\d]/', '', $from);
    }

    $exponent = array_flip($units)[$suffix] ?? null;
    if($exponent === null) {
        return null;
    }

    return $number * (1024 ** $exponent);
}

$testCases = ["13", "13B", "13KB", "10.5KB", "123Mi"];
var_dump(array_map('convertToBytes', $testCases));

Output:

array(5) { [0]=> int(13) [1]=> int(13) [2]=> int(13312) [3]=>
int(10752) [4]=> NULL } int(1)

human readable file size

Try something like this:

function humanFileSize($size,$unit="") {
  if( (!$unit && $size >= 1<<30) || $unit == "GB")
    return number_format($size/(1<<30),2)."GB";
  if( (!$unit && $size >= 1<<20) || $unit == "MB")
    return number_format($size/(1<<20),2)."MB";
  if( (!$unit && $size >= 1<<10) || $unit == "KB")
    return number_format($size/(1<<10),2)."KB";
  return number_format($size)." bytes";
}

Correct way to convert size in bytes to KB, MB, GB in JavaScript

From this: (source)

---

Unminified and ES6'ed: (by the community)

function formatBytes(bytes, decimals = 2) {
    if (!+bytes) return '0 Bytes'

    const k = 1024
    const dm = decimals < 0 ? 0 : decimals
    const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']

    const i = Math.floor(Math.log(bytes) / Math.log(k))

    return `${parseFloat((bytes / Math.pow(k, i)).toFixed(dm))} ${sizes[i]}`
}

// Demo code
document.body.innerHTML += `<input type="text" oninput="document.querySelector('p').innerHTML=formatBytes(this.value)" value="1000"><p>1000 Bytes</p>`

filesize conversion bytes to kb/mb/gb function does not work as expected

When $bytes is 0 the expression $bytes >= 1073741824 && $forceFormat === false evaluates to false. The switch statement jumps to the first case whose expression matches $bytes. The following script demonstrates, that false matches 0.

<?php       
switch (0) {
  case false:
    echo '0 is false';
    break;
  case true:
    echo '0 is true';
    break;
  default:
    echo '0 is something else';
    break;
}
?>

Because you want to jump to the first case which is true you should use switch (true).

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