Very simple Template View for Neos Flow

SimpleTemplateView.php

<?php
namespace Some\Package\View;

use TYPO3\Flow\Mvc\View\AbstractView;
use TYPO3\Flow\Reflection\ObjectAccess;

class SimpleTemplateView extends AbstractView
{
    /**
     * @var array
     */
    protected $supportedOptions = [
        'templateSource' => [null, 'Source of the template to render', 'string', true],
    ];

    /**
     * Renders the view
     *
     * @return string The rendered view
     * @api
     */
    public function render()
    {
        $source = $this->getOption('templateSource');
        return preg_replace_callback('/\{([a-zA-Z0-9\-_.]+)\}/', function($matches) {
            return ObjectAccess::getPropertyPath($this->variables, $matches[1]);
        }, $source);
    }
}

Usage:

$view = new SimpleTemplateView(['templateSource' => 'Some template with {simple} and {nested.name} placeholders.']);
$view->assignMultiple([
    'simple' => 'SIMPLE',
    'nested' => $someObject
]);
echo $view->render();