php - Get particular values multidimensional array Laravel

Solution:

you are not get direct use of item, you use $event_items = collect($events['03-11-2021']['0']->title);

Solution:

This result you have is basically a collection of collections of models. Collections implement array access so you can user $collection['index'] or you can use $collection->get('index'). If you want all the values in the collection you can call the $collection->all() method. I don't really understand what data you want to get from here or why you have a collection of collections in the first place but the $collection->map() or $collection->transform() method is usually used to extract specific data from a collection.

I also believe that $collection->items is a private property so if you want all the items it is the same as $collection->all()

You can check Collections documentation for how they work.