php 文件大小转换

function formatSize($size) {
    $units = array('B', 'KB', 'MB', 'GB', 'TB');
    $count = 0;
    while ($size >= 1024 && $count < count($units) - 1) {
        $size /= 1024;
        $count++;
    }
    return round($size, 2) . ' ' . $units[$count];
}

$sizeInBytes = 1048576; // 1MB in bytes
$formattedSize = formatSize($sizeInBytes);
echo $formattedSize; // 输出: 1.00 MB

function formatSize($size) {
    if (!is_numeric($size) || $size < 0) {
        return 'Invalid size';
    }
    $units = array('B', 'KB', 'MB', 'GB', 'TB');
    $count = 0;
    while ($size >= 1024 && $count < count($units) - 1) {
        $size /= 1024;
        $count++;
    }
    return round($size, 2) . ' ' . $units[$count];
}