So I’ve just started coding and watched YouTube tutorials, so far I have everything (btw using visual studio code) I have finally made the login and registration page and uses the email and password to login ( I used firebase To store the information of the customer which then allows them to enter my website and make a subscription now here is the difficult part how do I link the type of subscription they make to the customer and also I want to lock some stuff up for those who haven’t paid for that service/Information which is troubling as I haven’t found any tutorials on it I want to use stripe to pay any advice or help even YouTube tutorials will be great thanks also if anyone wants to talk one on one with me to guide me

Yesterday my php file of code had an output of my homepage but now when I opened that file using xampp localhost there is no output. Can anyone relate to this? Please help.

How am I supposed to connect this php based password manager to a website i created

i need your help to edit this web based application
the code below is used to load the modules (or item) in home and i wanna delete a specific module (or item) and i cant find how so if any could help me a will appreciate it !