Question

Im writing script that creates list of all files and folders,
and when next time it runs, i wanted to check if folder is modified since last time, and if not, exclude folder from reading this time,

I use filemtime(), and stat() function,

It works, when i add new files in subfolders date is changing, but if i edit file in folder, folder last modified date id not changing, using these functions.

Is there a way how to check if files in folder have been edited, without going through all files one by one??

this script will run very often, so i dont want so it goes through all files and folders every time,(in some folders there is a lot of files)

Answer 1

This could work:

function foldermtime($dir) {
    $foldermtime = 0;

    $flags = FilesystemIterator::SKIP_DOTS | FilesystemIterator::CURRENT_AS_FILEINFO;
    $it = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir, $flags));

    while ($it->valid()) {
        if (($filemtime = $it->current()->getMTime()) > $foldermtime) {
            $foldermtime = $filemtime;
        }
        $it->next();
    }

    return $foldermtime ?: false;
}

var_dump(foldermtime(__DIR__));