What is the potential issue with using the PHP function filesize() to display file sizes in a download script?

The potential issue with using the PHP function filesize() to display file sizes in a download script is that it returns the file size in bytes, which may not be human-readable. To solve this issue, you can convert the file size to a more readable format, such as KB, MB, or GB, before displaying it to the user. 

function formatFileSize($size) {
    $units = array('B', 'KB', 'MB', 'GB', 'TB');
    $i = 0;
    while ($size >= 1024 && $i < 4) {
        $size /= 1024;
        $i++;
    }
    return round($size, 2) . ' ' . $units[$i];
}

$fileSize = filesize('example.txt');
$formattedSize = formatFileSize($fileSize);

echo 'File Size: ' . $formattedSize;

Keywords

filesize download script memory consumption file size calculation PHP function

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