Sort Objekt in PHP by a key value

I need to sort the Ojekt $notes by the "hits" value in a PHP script, how can I do?

$notes = Note::whereIn('id' , $idArray)->get();
if(!empty($keywordArray))
{
foreach($keywordArray as $keyword)
{
foreach($notes as $note)
{
if($note->name != $this->keywordHighlighting($keyword, $note->name) or $note->description != $this->keywordHighlighting($keyword, $note->description))
{
$note->name = $this->keywordHighlighting($keyword, $note->name);
$note->description = $this->keywordHighlighting($keyword, $note->description);
$note->hits++;
}
}
}
}
return view('notes.show')->with('notes', $notes);