Recently, I asked a similar question about cataloging a collection, but it had very similar requirements. It was recommended to use Drupal. I set up a Drupal site in a few minutes, and then I customized the content types very quickly. I suggest looking at Drupal because:

1. It has built-in photos, and with the right module you can do all kinds of uploads.
2. Different categories can be implemented with different content types or simply with a field that specifies which category something's in.
3. It has user permissions that allow different content types for different users or roles.
4. News and blog posts are built-in.
5. I've never done this, but I see multiple modules for this.
6. Again, I've not done this, but there is a module for Azure storage.
7. It's based on PHP.

I hope this helps.

-Kert

Recently, I asked a similar question about cataloging a collection, but it had very similar requirements. It was recommended to use Drupal. I set up a Drupal site in a few minutes, and then I customized the content types very quickly.

I suggest looking at Drupal because:

• It has built-in photos, and with the right module you can do all kinds of uploads.

• Different categories can be implemented with different content types or simply with a field that specifies which category something's in.

• It has user permissions that allow different content types for different users or roles.

• News and blog posts are built-in.

• "Social feed either Twitter or Facebook" - I've never done this, but I see multiple modules for this.

• "Ability to use Azure for file storage" - Again, I've not done this, but there is a module for Azure storage.

• It's based on PHP.