1 files changed, 5 insertions, 1 deletions
diff --git a/phpBB/phpbb/cache/driver/apcu.php b/phpBB/phpbb/cache/driver/apcu.php
index 40192e4026..6a65e7155a 100644..100755
--- a/phpBB/phpbb/cache/driver/apcu.php
+++ b/phpBB/phpbb/cache/driver/apcu.php
@@ -25,7 +25,11 @@ class apcu extends \phpbb\cache\driver\memory
 	*/
 	function purge()
 	{
-		apcu_clear_cache();
+		/* use an iterator to selectively clear our cache entries without
+		   disturbing any other cache users
+		   (e.g. other phpBB boards hosted on this server) */
+		   apcu_delete(new \APCUIterator('#^' . $this->key_prefix . '#'));
+
 
 		parent::purge();
 	}