The correct way to delete all files older than 2 days in PHP

Just curious:

$files = glob(cacheme_directory() . '*');
foreach ($files as $file) {
    $filemtime = filemtime($file);
    if (time() - $filemtime >= 172800) {
        unlink($file);
    }
}

I just want to make sure if the code is correct or not. Thanks.

php file caching

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The correct way to delete all files older than 2 days in PHP

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