小枝变量作为参考 [英] Twig variables as references

问题描述

我正在尝试通过php参考更改Twig变量，但我无法实现.我环顾四周，也没有使用Twig函数或Twig过滤器，我可以做我想做的事.知道怎么做吗?

I'm trying to change a Twig variable via a php reference but I can't achieve that. I looked around and nor with Twig functions nor with Twig filters I could do what I want. Any idea how to do that?

{% set hiding_options_classes = "default" %}
{{ hiding_options_func(content.field_hiding_options, hiding_options_classes) }}
{{ hiding_options_classes }}

在我的Twig扩展文件中:

In my Twig extension file:

public function hiding_options_func($hiding_options, &$hiding_options_classes) {
    $hiding_options_classes = "coucou";
}

推荐答案

如果您想在扩展程序中更改变量，则需要通过引用传递上下文.

You would need to pass the context by reference if you wanted to change variables inside your extension e.g.

class Project_Twig_Extension extends \Twig\Extension\AbstractExtension {

    public function getFunctions() {
        return [
            new \Twig\TwigFunction('set', [$this, 'setValue'], ['needs_context' => true, ]),
        ];
    }

    public function setValue(&$context, $key, $value) {
        if (isset($context['_parent'])) $context['_parent'][$key] = $value;
        $context[$key] = $value;
    }
}

{% set foo = 'bar' %}
{{ foo }} {# out: bar #}
{% do set('foo', 'foo') %}
{{ foo }} {# out: foo #}

这篇关于小枝变量作为参考的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！