Question

我要接管一个使用Twig v1的项目，并且直到现在我还完全不了解Twig才能迁移到v2.5。...太好了：）

请看看，如果我缺少什么，请告诉我。我可以省略所有过滤器，并且可以使用，但是我想知道为什么它不是这样。

这是我看到的错误消息：

<b>Fatal error</b>:  Uncaught ReflectionException: Function () does not exist in D:\xampp\htdocs\project\includes\Twig\Node\Expression\Call.php:288
Stack trace:
#0 D:\xampp\htdocs\project\includes\Twig\Node\Expression\Call.php(288): ReflectionFunction-&gt;__construct('')
#1 D:\xampp\htdocs\project\includes\Twig\Node\Expression\Call.php(23): Twig_Node_Expression_Call-&gt;reflectCallable(NULL)
#2 D:\xampp\htdocs\project\includes\Twig\Node\Expression\Filter.php(32): Twig_Node_Expression_Call-&gt;compileCallable(Object(Twig_Compiler))
#3 D:\xampp\htdocs\project\includes\Twig\Compiler.php(84): Twig_Node_Expression_Filter-&gt;compile(Object(Twig_Compiler))
#4 D:\xampp\htdocs\project\includes\Twig\Node\If.php(46): Twig_Compiler-&gt;subcompile(Object(Twig_Node_Expression_Filter))
#5 D:\xampp\htdocs\project\includes\Twig\Node.php(82): Twig_Node_If-&gt;compile(Object(Twig_Compiler))
#6 D:\xampp\htdocs\project\includes\Twig\Compiler.php(84): Twig_Node-&gt;compile(Object(Twig_Compiler))
#7 D:\xampp\htdocs\project\includes\Twig\Node\Block.php(34 in <b>D:\xampp\htdocs\project\includes\Twig\Environment.php</b> on line <b>570</b>

在Twig环境页面中，我看到他们过滤了要包含的PHP脚本：

$twig->addFilter('is_array', new Twig_Filter_Function('is_array'));

我已将v2更新为：

$twig->addFilter(new Twig_Filter('is_array'));

从那里，我在模板中看到将'is_array'应用于附件数组：

    {% if attachments|is_array %}
<div class="knowledgebasearticleattachment">{{ LANG.ATTACHMENTS }}</div>
    {% for attachment in attachments %}
    <div><span class="knowledgebaseattachmenticon"></span> <a href="{{ attachment_url }}{{ attachment.id }}" target="_blank">{{ attachment.name }} ({{ attachment.filesize }})</a></div>

    {% endfor %}
{% endif %}

附件变量在控制器中定义为数组：

$q = $db->query("SELECT * FROM ".TABLE_PREFIX."attachments WHERE article_id=".$article['id']);
        while($r = $db->fetch_array($q)){
            $attachments[] = $r;
        }
        $template_vars = array();
        $template_vars['attachments'] = $attachments;

Answer 1

弄清楚了。我犯了一个简单的错误，现在对我来说很明显。我需要定义过滤器的Twig名称以及与之关联的PHP函数：

$twig->addFilter(new Twig_SimpleFilter('is_array','is_array'));
$twig->addFilter(new Twig_SimpleFilter('is_numeric','is_numeric'));
$twig->addFilter(new Twig_SimpleFilter('print_r','print_r'));

Twig X2.5-模板/ PHP过滤器

1 个答案: