<?php
/*
Plugin Name: My Test Plugin
Version: 1.0.0
*/

// Composer autoload.
require_once __DIR__ . '/vendor/autoload.php' ;

$requirements = new \Micropackage\Requirements\Requirements( 'My Test Plugin', array(
	'php'                => '7.0',
	'php_extensions'     => array( 'soap' ),
	'wp'                 => '5.3',
	'dochooks'           => true,
	'ssl'                => true,
	'plugins'            => array(
		array( 'file' => 'akismet/akismet.php', 'name' => 'Akismet', 'version' => '3.0' ),
		array( 'file' => 'hello-dolly/hello.php', 'name' => 'Hello Dolly', 'version' => '1.5' )
	),
	'theme'              => array(
		'slug' => 'twentysixteen',
		'name' => 'Twenty Sixteen'
	),
) );

/**
 * Run all the checks and check if requirements has been satisfied.
 * If not - display the admin notice and exit from the file.
 */
if ( ! $requirements->satisfied() ) {
	$requirements->print_notice();
	return;
}

// ... plugin runtime.

class CustomCheck extends \Micropackage\Requirements\Abstracts\Checker {

	/**
	 * Checker name
	 *
	 * @var string
	 */
	protected $name = 'custom-check';

	/**
	 * Checks if the requirement is met
	 *
	 * @param  string $value Requirement.
	 * @return void
	 */
	public function check( $value ) {

		// Do your check here and if it fails, add the error.
		if ( 'something' === $value ) {
			$this->add_error( 'You need something!' );
		}

	}

}

$requirements = new \Micropackage\Requirements\Requirements( 'My Test Plugin', array(
	'custom-check' => 'something else',
) );

$requirements->register_checker( 'CustomCheck' );

$is_good = $requirements->satisfied();