msgraph-sdk-php VS phpSPO

looks like there is an SDK, which is usually the preferred route https://github.com/microsoftgraph/msgraph-sdk-php

The official Microsoft Graph PHP SDK works just fine for us. I don't see much use for a Symfony specific library, to be honest, since mapping the Graph query results to database entities will likely be individual for each project.

Regarding basic auth - you're covered there, SMTP is the sole protocol where Basic Authentication will continue to work with no planned end date. However, there is a Graph SDK for PHP in case you want to check out doing things the 'modern' way - https://github.com/microsoftgraph/msgraph-sdk-php - I should note I have no experience with it.

Try to use this library: https://github.com/microsoftgraph/msgraph-sdk-php

For Azure AD, I'd recommend the combination of https://github.com/thephpleague/oauth2-client for the authentication part (getting the token) and the Microsoft Graph SDK for then using the token to get information about the user https://github.com/microsoftgraph/msgraph-sdk-php

This is my first time using the Microsoft Graph SDK for PHP and I'm trying to programmatically create and assign tasks to users in my directory (Generally what's described here). I might just be getting overwhelmed reading through all the documentation so quickly but I feel like I am missing or misunderstanding something.

You could take a look at https://github.com/vgrem/phpSPO

https://docs.microsoft.com/en-us/graph/tutorials/php?tabs=aad is a good resource. I also use. https://github.com/vgrem/phpSPO If your going to do it, might as well do it right.