How to use composer with pmmp plugins?

Hey guys,

image I have a composer file like this:

Code:

{
    "name": "plugin/plugin",
    "description": "Plugin",
    "type": "project",
    "require": {
        "pocketmine/pocketmine-mp": "^3.22.1",
        "joshcam/mysqli-database-class": "^2.9.3",
        "ext-mysqli": "*"
    },
    "autoload": {
        "psr-4": {
            "Plugin\\Plugin\\": "src/"
        }
    }
}

Using these dependencies is no problem in my IDE, but when I put the source files to my local plugins folder of my server, it cannot find the mysqli stuff I added in the composer.json. I just drag and drop my src + plugin.yml and using devtools - so I'm not converting my plugin into a phar or something like that. What step do I miss? I've a lot of experience in JavaScript...and there we have the package.json (the npm stuff) - I think its pritty similar.

I mean of course it cannot find these dependencies, since the mysqli sources aren't in the plugins folder of the server. Do I need to download the sources of mysqli and put this into my plugins folder? I already tried this out, but it didnt work. I'd like to use more dependecies for my plugin, not only msqli. Just a side note.

I've also basic knowledge in Java + Maven..so if someone is familar with this, you can also explain it to me in the java + maven-way


Thanks in advance.