PHP-DI

To install

composer require php-di/php-di

Usage

<?php
require './vendor/autoload.php';

class Speaker
{
    public function say($content)
    {
        echo "want to say:", $content, "\n";
    }
}

class Meeting
{
    private $speaker;

    public function __construct(Speaker $speaker)
    {
        $this->speaker = $speaker;
    }

    public function broadCast($content)
    {
        $this->speaker->say($content);
    }
}

//automatically inject speaker into meeting
$container = new DI\Container();
$meeting = $container->get('Meeting');
$meeting->broadCast("Hell World");

/**
 * the above codes are the same as the following
 * $speaker = new Speaker();
 * $meeting = new Meeting($speaker);
 * $meeting->broadCast("Hello World 2");
 */