outputBackendTemplate
The outputBackendTemplate
hook is triggered when a back end template is printed
to the screen. It passes the template content and the template name as arguments
and expects the template content as return value.
Parameters
string
$buffer
Content of the rendered back end template.
string
$template
The template name (e.g.
be_main
) without file extension.
Return Values
Return the original $buffer
or return your custom modification.
Example
// src/EventListener/OutputBackendTemplateListener.php
namespace App\EventListener;
use Contao\CoreBundle\DependencyInjection\Attribute\AsHook;
#[AsHook('outputBackendTemplate')]
class OutputBackendTemplateListener
{
public function __invoke(string $buffer, string $template): string
{
if ($template === 'be_main') {
// Modify $buffer
}
return $buffer;
}