diff --git a/mod/quiz/edit.php b/mod/quiz/edit.php
index 07db4397018..1d4d665bc1b 100644
--- a/mod/quiz/edit.php
+++ b/mod/quiz/edit.php
@@ -559,7 +559,7 @@ if (!$quiz_reordertool) {
     $randomform = new quiz_add_random_form(new moodle_url('/mod/quiz/addrandom.php'), $contexts);
     $randomform->set_data(array(
         'category' => $pagevars['cat'],
-        'returnurl' => str_replace($CFG->wwwroot, '', $thispageurl->out(false)),
+        'returnurl' => $thispageurl->out_as_local_url(false),
         'cmid' => $cm->id,
     ));
     ?>
diff --git a/mod/quiz/editlib.php b/mod/quiz/editlib.php
index 29e99d7490f..a40e9bbfb29 100644
--- a/mod/quiz/editlib.php
+++ b/mod/quiz/editlib.php
@@ -453,7 +453,7 @@ function quiz_print_question_list($quiz, $pageurl, $allowdelete, $reordertool,
 
     $pageopen = false;
 
-    $returnurl = str_replace($CFG->wwwroot, '', $pageurl->out(false));
+    $returnurl = $pageurl->out_as_local_url(false);
     $questiontotalcount = count($order);
 
     foreach ($order as $count => $qnum) {
@@ -728,7 +728,7 @@ function quiz_print_pagecontrols($quiz, $pageurl, $page, $hasattempts, $defaultc
     $returnurladdtoquiz = new moodle_url($pageurl, array('addonpage' => $page));
 
     // Print a button linking to the choose question type page.
-    $returnurladdtoquiz = str_replace($CFG->wwwroot, '', $returnurladdtoquiz->out(false));
+    $returnurladdtoquiz = $returnurladdtoquiz->out_as_local_url(false);
     $newquestionparams = array('returnurl' => $returnurladdtoquiz,
             'cmid' => $quiz->cmid, 'appendqnumstring' => 'addquestion');
     create_new_question_button($defaultcategoryid, $newquestionparams,
diff --git a/mod/quiz/locallib.php b/mod/quiz/locallib.php
index 88f696414d9..e47522d09e7 100644
--- a/mod/quiz/locallib.php
+++ b/mod/quiz/locallib.php
@@ -844,7 +844,7 @@ function quiz_question_edit_button($cmid, $question, $returnurl, $contentafteric
     // Build the icon.
     if ($action) {
         if ($returnurl instanceof moodle_url) {
-            $returnurl = str_replace($CFG->wwwroot, '', $returnurl->out(false));
+            $returnurl = $returnurl->out_as_local_url(false);
         }
         $questionparams = array('returnurl' => $returnurl, 'cmid' => $cmid, 'id' => $question->id);
         $questionurl = new moodle_url("$CFG->wwwroot/question/question.php", $questionparams);
diff --git a/question/editlib.php b/question/editlib.php
index c433cbe513b..a0cc6b35913 100644
--- a/question/editlib.php
+++ b/question/editlib.php
@@ -871,7 +871,7 @@ class question_bank_view {
         }
 
         // Create the url of the new question page to forward to.
-        $returnurl = str_replace($CFG->wwwroot, '', $pageurl->out(false));
+        $returnurl = $pageurl->out_as_local_url(false);
         $this->editquestionurl = new moodle_url('/question/question.php',
                 array('returnurl' => $returnurl));
         if ($cm !== null){
diff --git a/question/engine/renderer.php b/question/engine/renderer.php
index 96b8353d120..006729aacc1 100644
--- a/question/engine/renderer.php
+++ b/question/engine/renderer.php
@@ -278,8 +278,7 @@ class core_question_renderer extends plugin_renderer_base {
 
         $params = $options->editquestionparams;
         if ($params['returnurl'] instanceof moodle_url) {
-            $params['returnurl'] = str_replace($CFG->wwwroot, '',
-                    $params['returnurl']->out(false));
+            $params['returnurl'] = $params['returnurl']->out_as_local_url(false);
         }
         $params['id'] = $qa->get_question()->id;
         $editurl = new moodle_url('/question/question.php', $params);