與實際值的Symfony

Question

您好我有一個模板存儲在數據庫替換常量：如下：

<p>Dear [[OWNER_NAME]],</p> 

<p><br /> 
We are thanks put&nbsp;[[LOCATION_NAME]] to you.</p> 

<p>It is very early stagesyou know.</p> 

<p>If anything comes of it, we will be in contact immediately with a further email.</p> 

<p>Best wishes,</p> 

<p>[[CUSTOMER]]</p> 

所以，當我與此模板發送的電子郵件，我想用實際值替換上述常量：

Like [[CUSTOMER]]就是「Jemes」等。因爲我已經存儲了常量，在將此電子郵件模板發送給客戶之前，有什麼方法可以知道需要用哪些常量替換哪些常量？

我使用Symfony2.8與MySQL

//Controler code Is: 
public function sendEmails(){ 

return $this->render('action_and_message/messageTemplates/emailTemplates /emailTemplate.html.twig', array(
      'error' =>"", 
      'data' =>$getTemplates->getEmailTemplate() 
     )); 

} 
//My Twig is 

{% extends 'emailTemplateLayout.html.twig' %} 

{% block content %} 

    <div style="width:80%; margin: 0 auto; padding: 10px"> 
{{ data | raw}} 
    </div> 

{% endblock %} 

在此先感謝

Answer 1

首先，你可能需要創建和使用數據庫模板加載器，這裏有一個例子（它的有點難看，但它的工作原理） ：

class DBTwigLoader implements \Twig_LoaderInterface, \Twig_ExistsLoaderInterface 
{ 
    protected $dbh; 
    protected $table; 

    public function __construct(\PDO $dbh, $table = 'tmpl_twig') 
    { 
     $this->dbh = $dbh; 
     $this->table = $table; 
    } 

    public function getSource($name) 
    { 
     if (false === $source = $this->getValue('source', $name)) { 
      throw new \Twig_Error_Loader(sprintf('Template "%s" does not exist.', $name)); 
     } 
     return $source; 
    } 

    // Twig_ExistsLoaderInterface as of Twig 1.11 
    public function exists($name) 
    { 
     return $name === $this->getValue('name', $name); 
    } 

    public function getCacheKey($name) 
    { 
     return $name; 
    } 

    public function isFresh($name, $time) 
    { 
     if (false === $lastModified = $this->getValue('last_modified', $name)) { 
      return false; 
     } 
     return $lastModified <= $time; 
    } 

    protected function getValue($column, $name) 
    { 
     $sth = $this->dbh->prepare('SELECT ' . $column . ' FROM '.$this->table.' WHERE name = :name'); 
     $sth->execute(array(':name' => (string)$name)); 
     return $sth->fetchColumn(); 
    } 
} 

之後，你可以渲染做到這一點：

$loader = new DBTwigLoader($dbh); 
$twig = new Twig_Environment($loader); 

//echo $twig->render('index.twig', array('name' => 'Fabien')); 
//or eventually Im doing that (I use just some blocks): 
$template = $twig->loadTemplate($messagesPayload['template_name']); 
$bodyHtml = $template->renderBlock('bodyHtml', ['recipient' => $recipient]); 

Template_name將是'yourtempname'，它將在db的名稱列下。請確保您準備架構，爲一點的更多細節看看是：使用包裝樹枝，只是一個服務

{% block subject 'Welcome to newsletter, ' ~ data.name %} 

{% block bodyHtml %} 
    <div style="background-color: black; color: lime;"> 
     Here is <strong>free trial of our new soft</strong>. 
     As of our experience <strong><i>we think that:</i></strong><br/> {{ data.message }} 
    </div> 
{% endblock %} 

眼下林：http://twig.sensiolabs.org/doc/recipes.html#using-a-database-to-store-templates與上面的代碼工作

樣品模板此服務從數據庫呈現模板，但我認爲如果您發現它更方便，您可以將它連接到您的基本Twig服務。

從字符串

模板我不知道爲什麼你在模板中使用常量，但它會更好，將它們轉換成適當的枝條模板即[OWNER_NAME]以{{OWNER_NAME }}然後如果你不想要的模板轉換數據庫，那麼你可以使用str_replace（）函數的功能，以取代枝杈將替換值的關懷......

class DefaultController extends Controller 
{ 
    public function indexAction() 
    { 
     //this will create twig template from string and array of data 
     $template = $this->get('twig')->createTemplate(
        "testing {{OWNER_NAME}} tests {{CUSTOMER}}" 
     ); 
     $templateString = $template->render(
        array('OWNER_NAME'=>'Joe', 'CUSTOMER' => 'some customer') 
     ); 

     // if you're not using it yet, try out dump (VarDumper component), 
     //included in Symfony standard, it will show in webtoolbar as well 
     dump($template); 
     dump($templateString); 

     //return response if in controller (*using symfony 3.2) 
     return new Response($templateString); 
    } 
} 

[[{{在和]與} }在傳遞給crateTemplate函數之前。

如果你決定堅持使用[[VAR]]格式，那麼str_replace（）或更好的preg_replace_（全部）可以爲你找到答案，但如果你使用Symfony和樹枝，我不明白這一點。