如何在 October CMS 中添加 Twig 测试？

Question

这在我的 registerMarkupTags 函数中运行良好。

            'functions' => [
                'isNumeric' => function($value) { return is_numeric($value); }

所以我可以写：

{% if isNumeric(result) %}

我想把它作为一个测试，例如

{% if result is numeric %}

Answer 1

您可以为 twig 添加自定义扩展

来源：https://tutorialmeta.com/october-cms/october-cms-extend-custom-twig-markup

Add below code to your plugin.php file

// other imports
use Twig\Extension\AbstractExtension as TwigExtension;

// our extension class 
// you can declare here inside plugin.php file or in your `plugin\classes` file
// for simplicity we have declared it here

class MyTwigExtension extends TwigExtension {
    public function getTests() {
        return [
            new \Twig\TwigTest('numeric', function ($value) {
                return is_numeric($value);
            })
        ];
    }
}

class Plugin extends PluginBase {
    public function boot() {
        Event::listen('cms.page.beforeDisplay', 
            function ($controller, $url, $page) {
                $controller->getTwig()->addExtension(new MyTwigExtension);
            }
        );
    }
    // other code
}

Now from your markup

{% if 12 is numeric %}
    yes numeric.
{% else %}
    not a numeric.
{% endif %}

如有疑问请评论。

如何在 October CMS 中添加 Twig 测试？

How do I add a Twig test in October CMS?

octobercms

twig-extension