How can I sort files by DESC order with Symfony Finder Component?

Question

By default Symfony Finder Component sorts files by ASC order.

//sorting by ASC order
$finder->files()->in($this->getDumpPath())->sortByModifiedTime();

How can I sort files by DESC?

Bandanna

symfony finder component cant do this , you must sort by desc after get result – Handspike

You may also use the sort method and give your own sort anonymous function (see Symfony\Component\Finder\Iterator\SortableIterator) – Succinct

@YannEugoné Can you give me code example with anonymous function in my case? – Bandanna

$finder->sort(function ($a, $b) { return strcmp($b->getRealpath(), $a->getRealpath()); }); – Succinct

@Victor You mean by modified time DESC? – Standush

@COil, Yes, or at least by filename DESC – Bandanna

Ok, so @YannEugoné answer seems good. BTW it could be nice to had the feature to the finder component. – Standush

I agree with this, as this is not simple to reuse or modify the standard behaviors of the SortableIterator... – Succinct

@YannEugoné How you know that in anonymous function passed 2 arguments in your example? I don't understand ( – Bandanna

This is all about sorting tips. It's always the same thing with that kind of job. Please take a look to fr2.php.net/manual/fr/function.usort.php. But to be more precise, I've just take a code snipet from the Symfony\Component\Finder\Iterator\SortableIterator, and I've reverted the return condition. – Succinct

@YannEugoné, Thanks, I understand! Can you post your comment as answer to my question and I accepted it? – Bandanna

Answer 1

You may use the sort method and give your own sort anonymous function (see Symfony\Component\Finder\Iterator\SortableIterator)

$finder->sort(function ($a, $b) { return strcmp($b->getRealpath(), $a->getRealpath()); });

This is all about sorting tips. It's always the same thing with that kind of job. Please take a look to the usort function.

To be more precise, I've just take a code snipet from Symfony\Component\Finder\Iterator\SortableIterator, and I've reverted the return condition.

Calefactory

Answer 2

The reverseSorting method, that was introduced in Symfony 4.2, can be used now.

$finder = new Finder();
$finder->sortByModifiedTime();
$finder->reverseSorting();
$finder->files()->in( $directoryPath );

foreach ($finder as $file) {
  // log each modification time for example 
  // $this->logger->debug ( \date('d/m/Y H:i', $file->getMTime()) );
}

Github commit

Knave

Answer 3

In Symfony\Component\Finder\Iterator\SortableIterator you can see the ASC case, so the DESC case is:

$finder->files()->in($this->getDumpPath())->sort(
    function ($a, $b) {
       return ($b->getMTime() - $a->getMTime());
    }
);

Baldheaded