PHP - Moved: Knowledge For Php.ini

Hi..   I've hit a wall that I cannot seem to overcome - and I don't know what to do about it because I can't even really accurately describe the problem (but I'll try).   It seems to me that the only way to progress beyond a certain point, requires you to have a deeper understanding of operating systems and servers and hypervisors etc. Stuff that goes wayyy beyond doing a bit of PHP and Javascript.   It's frustrating because I'm at that place and I can't get my head around it all. It's too vast!   I really want to stop using MAMP and progress on to things like VirtualBox and Vagrant. The primary reason for doing this is that I am really keen to use a PHP Framework called Laravel. But all the documentation I see tells me that I need to use something called composer to install it. Composer is a dependancy manager (I'm not sure what dependancies are, really) but in order to do that I need a virtual server because I don't think I want all this on my physical machine.   In order to get a virtual server I think I need a virtual operating system. I think. So I have tried to install VirtualBox and I just want to sling my laptop out of the f***ing window to be perfectly honest. It's not working. And even if it did work I wouldn't be able to tell.   So.. I'm clearly just venting here. There is no question. If there was a question it would be.... How can I just learn enough to get by?

Quick question about the dependency manager Composer with PHP. I have it installed and am pulling in a few libraries, it works pretty well as far as I can tell. I have a question that might be dumb, so I apologize in advance.

When connecting to your application it's still required to use the lines similar to the following?

<script src="vendor/components/jquery/jquery.min.js"></script>
<link rel="stylesheet" href="vendor/twbs/bootstrap/dist/css/bootstrap.css" >

Also I'm trying to figure out how to install the x3dom library, but cannot get composer to do it. (https://www.x3dom.org/)

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