What PHP knowledge is needed to make a simple online store?

Question

CMS

Essence. Let's say I want to create simple online stores. What knowledge is needed for this at the PHP level? I know that you can use frameworks and engines such as Opencart, Wordpress... What exactly do you need to study according to Pykha in this case?
UPD 0:20 (10/14/17): I know layout and js at the proper level, I know php at the level of google or copy-paste the solution, but I understand the principles of practical work.
Please people, your (of course) Veryinteresting worldviews and views about the fact that WordPress is a litter on a stick for IMs, etc., etc., keep it with you. I'm interested in the specific task, and not in whether it's right, wrong, bad, good ... I generally have a deep violet for correctness and for your opinion, gentlemen programmers, caressed by office life and the indulgence of superiors.

Answer 1

Maybe none at all. Only buttons to be able to click. Put templates, uploaded goods and sell

Answer 2

If you need a simple store and use Opencart, you will need minimal knowledge in php (most likely none), more on layout, design and template engine

Answer 3

Guys, can I get from Kostroma to Moscow, what driving knowledge is needed?
Keep your opinion to yourself, if your boss tells you to hate taxis and trains, I don't give a shit about that.
Answer: you can even walk on foot, it depends on how fast you need and what you are willing to sacrifice for this, time, comfort, quality of the entire trip - there are many factors, but abstractly - in any way and with any knowledge you can go this way.
even crawl on all fours.

Answer 4

When I made my first store: the first one was the first one, and even without an engine (without cms, somehow I didn’t like open source right away). I knew php at the level the first time I picked up a book, but I only read "from the author".
For a long time I could not write the admin panel and rewrite it in php... as an admin panel (not complicated, but it was possible to manage everything) there was a constantly finished application under win ... xs, of course it worked then much faster compared to php admin panels, because there was just a direct connection to the database and fire, but there were also disadvantages such as the absence of a visive ...
This is me to the fact that a store is not something extremely complicated. A couple of nuances separate it from the usual crap article-site, and so - the same eggs in fact ...
AdditionI also thought that something was missing in the answer and realized what: the main essence of any resource is usefulness, interestingness, convenience. And on what you write it, what level of your php and adjoining it - for the end visitor absolutely do not care! If you can endow a resource (not specifically a store) with these qualities - go ahead! At least on bare static html - you will administer it later.

Answer 5

Basic knowledge of PHP is required.
Further, the required depth depends on the technical specifications for the store, because "a simple store" is that magic phrase that, when I see it on the stock exchange, I run headlong from such a customer