make new class compatible to old codecheckers

Author: bluetom

filter.php

@@ -1,28 +1,30 @@
-<?php
-// This file is part of Moodle - http://moodle.org/
-//
-// Moodle is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Moodle is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
-
-/**
- * File only retained to prevent fatal errors in code that tries to require/include this.
- *
- * @todo MDL-82708 delete this file as part of Moodle 6.0 development.
- * @deprecated This file is no longer required in Moodle 4.5+.
- * @package    filter_opencast
- * @copyright  2024 Thomas Niedermaier, University of Münster
- * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-defined('MOODLE_INTERNAL') || die();
-
-debugging('This file is no longer required in Moodle 4.5+. Please do not include/require it.', DEBUG_DEVELOPER);
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * File only retained to prevent fatal errors in code that tries to require/include this.
+ *
+ * @todo MDL-82708 delete this file as part of Moodle 6.0 development.
+ * @deprecated This file is no longer required in Moodle 4.5+.
+ * @package    filter_opencast
+ * @copyright  2024 Thomas Niedermaier, University of Münster
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+defined('MOODLE_INTERNAL') || die();
+
+class_alias(\filter_opencast\text_filter::class, \filter_opencast::class);
+
+debugging('This file is no longer required in Moodle 4.5+. Please do not include/require it.', DEBUG_DEVELOPER);