include php package in file instead of composer - php

Question

I want to include a php package, a css parser: https://github.com/sabberworm/PHP-CSS-Parser In installation guide it says to "Add php-css-parser to your composer.json":
{
"require": {
"sabberworm/php-css-parser": "*"
}
}
(I don't even know what composer.json is) Since I need only in one script, is there a way to include it only in a file? Like:
<?php
include //something here
//Do stuff with css parser
?>
Thank you

Answer 1

Your best approach would be to familiarize yourself with composer, what it's for and how it works.
You could copy the code from the module manually and include it in your project, but why bother?
You should simply need to run composer require sabberworm/php-css-parser from your project's root directory. Composer will automatically create the composer.json file which defines your project information and its dependencies, and the composer.lock file which stores information about the version of each dependency you've installed so you can deploy specific versions to other places.
If you don't have composer installed, check out the download instructions.
Once you've installed it, you need to include the composer autoloader and you will be ready to include your custom package:
<?php
// Include composer's autoloader
include 'vendor/autoload.php';
// Now you can use any composer installed package:
$parser = new Sabberworm\CSS\Parser($sText);