diff --git a/mod/choice/report.php b/mod/choice/report.php
index 328c160e042..ec8cad8c657 100644
--- a/mod/choice/report.php
+++ b/mod/choice/report.php
@@ -47,7 +47,7 @@
     }
 
     if (!$users) {
-        print_heading(get_string("nousersyet"));
+        print_heading(get_string("nousersyet"));        
     }
 
     if ($allresponses = get_records("choice_answers", "choiceid", $choice->id)) {
diff --git a/mod/choice/view.php b/mod/choice/view.php
index 2017674eb80..4e7b6457a47 100644
--- a/mod/choice/view.php
+++ b/mod/choice/view.php
@@ -3,7 +3,7 @@
     require_once("../../config.php");
     require_once("lib.php");
 
-    $id = required_param('id',PARAM_INT);    // Course Module ID
+    require_variable($id);    // Course Module ID
 
     if (! $cm = get_record("course_modules", "id", $id)) {
         error("Course Module ID was incorrect");
diff --git a/mod/quiz/export.php b/mod/quiz/export.php
index e611ad2cb21..8799787b2bc 100644
--- a/mod/quiz/export.php
+++ b/mod/quiz/export.php
@@ -93,10 +93,6 @@
 
     /// Print upload form
 
-    if (!$categories = quiz_get_category_menu($course->id, false)) {
-        error("No categories!");
-    }
-
     // get valid formats to generate dropdown list
     $fileformatnames = get_import_export_formats( "export" );
 
diff --git a/mod/quiz/import.php b/mod/quiz/import.php
index 24e710b3102..7fb8a5991fe 100644
--- a/mod/quiz/import.php
+++ b/mod/quiz/import.php
@@ -84,10 +84,6 @@
 
     /// Print upload form
 
-    if (!$categories = quiz_get_category_menu($course->id, false)) {
-        error("No categories!");
-    }
-
     // get list of available import formats
     $fileformatnames = get_import_export_formats( 'import' );
 
diff --git a/mod/resource/fetch.php b/mod/resource/fetch.php
index 3e67bd08e4a..4cb9f82b20c 100644
--- a/mod/resource/fetch.php
+++ b/mod/resource/fetch.php
@@ -6,8 +6,8 @@
     require_once("../../config.php");
     require_once("lib.php");
 
-    $id = required_param('id',0,PARAM_INT);     // Course Module ID
-    $url = required_param('url');    // url to fetch
+    $id = required_param('id', PARAM_INT);     // Course Module ID
+    $url = required_param('url', PARAM_URL);    // url to fetch
 
     if (! $cm = get_record("course_modules", "id", $id)) {
         error("Course Module ID was incorrect");