How do I add a custom filter to my Twig templates inside Slim?
Using an example from http://twig.sensiolabs.org/doc/advanced.html#creating-an-extension : in my main file Slim
that creates the view:
$filter = new Twig_SimpleFilter( 'stripslashes', function ( $string ) {
return stripslashes( $string );
});
$loader = new \Twig_Loader_String();
$twig = new Twig_Environment($loader);
$twig->addFilter($filter);
$app->view($twig);
$app->view()->setData( array(
'nav' => $nav,
'sidenav' => $sidenav,
));
Results: Call to undefined method Twig_Environment::appendData()
.
Tried it in different ways like this:
$app->view(new \Slim\Views\Twig());
$app->view->parserExtensions = array(
new \Slim\Views\TwigExtension(),
);
$app->view->addFilter($filter);
but I just don't understand how this is supposed to work.
source to share
For Slim 3, everything has changed. This can be done in one line:
$view->getEnvironment()->addFilter($filter);
But this is not particularly useful without context, so here is a complete sample based on the example provided on the Slim Framework website: http://www.slimframework.com/docs/features/templates.html
This code demonstrates adding a filter to encode text with rot13
<?php
// Create app
$app = new \Slim\App();
// Get container
$container = $app->getContainer();
// Register component on container
$container['view'] = function ($container) {
$view = new \Slim\Views\Twig('path/to/templates', [
'cache' => 'path/to/cache'
]);
$view->addExtension(new \Slim\Views\TwigExtension(
$container['router'],
$container['request']->getUri()
));
$filter = new Twig_SimpleFilter('rot13', function ($string) {
return str_rot13($string);
});
$view->getEnvironment()->addFilter($filter);
return $view;
};
// Render Twig template in route
$app->get('/rot13/{text}', function ($request, $response, $args) {
return $this->view->render($response, 'rot13.html', [
'name' => $args['text']
]);
})->setName('rot13');
// Run app
$app->run();
And the html file rot13.html contains:
{{text|rot13}}
Point your browser at your server name / rot 13 / an pineapple and you should see
cvarnccyr
source to share