Contao Summit 2026 in Leipzig 15th and 16th October

parseBackendTemplate

The parseBackendTemplate hook is triggered when a back end template is parsed. It passes the template content and the template name as arguments and expects the template content as return value.

Parameters

  1. string $buffer

    Content of the parsed back end template.

  2. string $template

    The template name (e.g. be_widget) without file extension.

Return Values

Return the original $buffer or override with your custom modification.

Example

// src/EventListener/ParseBackendTemplateListener.php
namespace App\EventListener;

use Contao\CoreBundle\DependencyInjection\Attribute\AsHook;

#[AsHook('parseBackendTemplate')]
class ParseBackendTemplateListener
{
    public function __invoke(string $buffer, string $template): string
    {
        if ('be_main' === $template) {
            // Modify $buffer
        }

        return $buffer;
    }
}

References