Glob() sort by date order

PHP
4

Using your example as a starting point:

$files = [];
foreach (glob('sqlbackup2/*') as $file) {
    if (!is_dir($file)) {
        $files[] = $file;
    }
}

$sortedFiles = usort(
    $files,
    function($file1, $file2) {
        return filemtime($file1) <=> filemtime($file2);
    }
);

foreach ($sortedFiles as $file) {
    printf(
        '<option value="%s">%s</option>',
        basename($file),
        date('m/d/Y H:i', filemtime($file))
    )
}