<?php

class Injector
{
    static protected $services;
    
    static function setServices(\Pimple $services)
    {
        static::$services = $services;
    }
    
    /**
     * Property decorator maker
     */
    static function inject($service)
    {
        $services = static::$services;
        
        $decorator = function($object, $property) use ($services, $service) {
            return $services[$service];
        };
        
        return $decorator;
    }
}

$services = new \Pimple;
$services['foo'] = function() {
    return "bar";
};

Injector::setServices($services);

class Foo {
    {% Injector::inject('foo') %}
    protected $bar;
    
    function getBar()
    {
        return $this->bar;
    }
}

$f = new Foo;

var_dump($f->getBar());
// Output:
// string("bar")