如何在 Slim 中向我的 Twig 模板添加自定义过滤器? [英] How can I add a custom filter to my Twig templates inside of Slim?

问题描述

使用 http://twig.sensiolabs.org/中的示例doc/advanced.html#creating-an-extension:在我创建视图的主要 Slim 文件中:

Using the example from http://twig.sensiolabs.org/doc/advanced.html#creating-an-extension: within my main Slim file 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,
));

结果:调用未定义的方法 Twig_Environment::appendData().

尝试过各种方式，例如:

Tried in various ways such as this:

$app->view(new \Slim\Views\Twig());
$app->view->parserExtensions = array(
    new \Slim\Views\TwigExtension(),
);

$app->view->addFilter($filter);

但我只是不明白它应该如何工作.

but I'm just not understanding how it's supposed to work.

推荐答案

对于 Slim 3，事情发生了变化.它可以在一行中完成:

For Slim 3, things have changed. It can be done in one line:

$view->getEnvironment()->addFilter($filter);

但是如果没有上下文，这不是特别有用，所以这里有一个完整的示例，基于 Slim Framework 网站上提供的示例:http://www.slimframework.com/docs/features/templates.html

But that isn't particularly useful without context, so here is a full sample, based on the example provided at the Slim Framework Website: http://www.slimframework.com/docs/features/templates.html

此代码演示了添加过滤器以使用 rot13 对文本进行编码

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();

html 文件 rot13.html 包含:

And the html file rot13.html contains:

{{text|rot13}}

将浏览器指向 yourservername/rot13/pineapple，您应该会看到

Point your browser at yourservername/rot13/pineapple and you should see

cvarnccyr

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