I'm following the steps described here to use twig-view within Slim https://github.com/slimphp/Twig-View/tree/3.1.0#usage but I'm getting the following error on my screen when I try to use anyof the template functions used in TwigExtension
Fatal error: Uncaught Twig\Error\SyntaxError: Unknown "url_for" function.
I have run $ composer require slim/twig-view:^3.0
successfully, my composer.json file looks like this
"require": {
"slim/slim": "4.*",
"slim/psr7": "^1.2",
"league/container": "^3.3",
"slim/twig-view": "^3.0"
},
and this is my code
require_once __DIR__ . '/../vendor/autoload.php';
$container = new \Slim\Factory\Container();
\Slim\Factory\AppFactory::setContainer($container);
$container->add('view', function () {
return \Slim\Views\Twig::create(__DIR__ . '/views', [
'cache' => false,
]);
});
$app = \Slim\Factory\AppFactory::create();
$app->add(\Slim\Views\TwigMiddleware::createFromContainer($app));
require_once __DIR__ . '/../routes.php';
// routes.php
$app->get('/', function ($request, $response, $args) use ($container) {
return $container->get('view')->render($response, 'home.twig', ['foo' => 'test']);
})->setName('home');
// home.twig
...
<body>
Home {{ foo }}
<br>
<a href="{{ url_for('about') }}">About</a>
</body>
...
If I remove the url_for
from the twig template the page loads fine on the browser. I tried to search for TwigExtension in my codebase and the vendor folder, but can't find any file like that.
Am I doing something wrong here?
Looks like it's because of League container. It seems to be creating a new instance of Twig every time the function gets called $container->get('view')
returns a new instance every time instead of referencing the same one. So a workaround would be
$twig = \Slim\Views\Twig::create(__DIR__ . '/views', [
'cache' => false,
]);
$container->add('view', function () use (&$twig) {
return $twig;
});
// Or this instead
$container->add(
'view',
\Slim\Views\Twig::create(__DIR__ . '/views', [
'cache' => false,
])
);