How can you pass a parameter from an action to the layout in Symfony

The global layout.php file contains the tags for each page:

<body> 
    <?php echo $sf_content ?>
</body>

But for all my inner HTML pages of the site, a class is applied to the body tag:

 <body class="inner-page"> 
    <?php echo $sf_content ?>
 </body>

How can I pass in a class to the layout from different templates?

Solution

in your layout.php

<body <?php if (!include_slot('body_id')): ?>id="default"<?php endif; ?>>

in your templates :

<?php slot('body_id') ?>id="bla"<?php end_slot(); ?>

<?php slot(
  'body_id',
  sprintf('id="%s"', $sf_params->get('module')))
?>