树枝模板引擎和截断文本

时间:2012-11-08 16:29:47

标签: php twig templating templating-engine

根据this site,我一直在学习如何使用Twig。 这是我的代码,是教程的变体:

的index.php:

<?php
// include and register Twig auto-loader
include 'Twig/Autoloader.php';
Twig_Autoloader::register();

// attempt a connection
try {
  $dbh = new PDO('mysql:dbname=articles;host=localhost', 'test', 'testing');
} catch (PDOException $e) {
  echo "Error: Could not connect. " . $e->getMessage();
}

// set error mode
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

// attempt some queries
try {
  // execute SELECT query
  // store each row as an object
  $sql = "SELECT * FROM schedule GROUP BY airtime";
  $sth = $dbh->query($sql);
  while ($row = $sth->fetchObject()) {
    $data[] = $row;
  }

  // close connection, clean up
  unset($dbh); 

  // define template directory location
  $loader = new Twig_Loader_Filesystem('templates');

  // initialize Twig environment
  $twig = new Twig_Environment($loader);
  $escaper = new Twig_Extension_Escaper(false);
$twig->addExtension($escaper);
  // load template
  $template = $twig->loadTemplate('countries.tmpl');


  // set template variables
  // render template
  echo $template->render(array (
    'data' => $data
  ));

} catch (Exception $e) {
  die ('ERROR: ' . $e->getMessage());
}
?>

和模板页面:

 {% for d in data %}
      <tr>
        <td>{{ d.articleid }}</td>
        <td>{{ d.articlename }}</td>
        <td>{{ d.info }}</td>
      </tr> 
      {% endfor %}

通过以下方式启用自动转义:

     $twig = new Twig_Environment($loader);
  $escaper = new Twig_Extension_Escaper(false);
$twig->addExtension($escaper);

但是,我想截断文本并尝试通过将其添加到extensions目录来安装Text扩展,但我不知道如何让它工作,所以我可以这样做:

{{d.info|truncate(40)}}

我确实在谷歌上看过,但我发现它与Symfony相关,我正在使用Twig,只是为了感受它作为模板引擎。

如何在Twig中启用截断文本?

2 个答案:

答案 0 :(得分:2)

你已经有了一半的解决方案,因为看起来你只是缺少添加扩展,这与你对escaper扩展的基本相同:

$twig->addExtension(new Twig_Extensions_Extension_Text()); 

应该这样做。

答案 1 :(得分:1)

在config.yml中启用它的服务:

services:
    twig.extension.text:
        class: Twig_Extensions_Extension_Text
        tags:
                - { name: twig.extension }