Is regular PHP still viable?

I am trying to gain experience writing an ecommerce site and have nearly completed my administrator’s product system.

But, PHP was mentioned on a web site as being obsolete unless it now uses, “dependency injection frameworks: Symfony and Laravel” and a dependency manager: Composer. Also it now uses “ORM’s for relational database development.”

I am wondering if this is true, or am I learning something that is still used and will help me obtain an internship? Really, should I continue to work with this older (and simpler) style of PHP?

Thanks,
JoshuaEir
SEMrush