From 579b4a8287c98fd206f8a1369f7291ee47125413 Mon Sep 17 00:00:00 2001
From: rxu <rxu@mail.ru>
Date: Mon, 16 Jun 2025 22:25:59 +0700
Subject: [PATCH] [ticket/17527] Add Twig extensions existence check while
 registering

PHPBB-17527
---
 phpBB/phpbb/template/twig/twig.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/phpBB/phpbb/template/twig/twig.php b/phpBB/phpbb/template/twig/twig.php
index 66d3d78b0e..696866fa3d 100644
--- a/phpBB/phpbb/template/twig/twig.php
+++ b/phpBB/phpbb/template/twig/twig.php
@@ -99,7 +99,10 @@ class twig extends \phpbb\template\base
 
 		foreach ($extensions as $extension)
 		{
-			$this->twig->addExtension($extension);
+			if (!$this->twig->hasExtension(get_class($extension)))
+			{
+				$this->twig->addExtension($extension);
+			}
 		}
 
 		// Add admin namespace