Minor - fixing PHP notice.

main/announcements/announcements.php

@@ -109,7 +109,7 @@ if (!empty($_POST['To']) and ($select_groupusers_status=="show")) {
 	$_SESSION['select_groupusers'] = "hide";
 }
 
-$origin = empty($_GET['origin']) ? '' : Security::remove_XSS($_GET['origin']);
+$origin = isset($_GET['origin']) ? Security::remove_XSS($_GET['origin']) : null;
 
 /* 	Action handling */
 

main/user/subscribe_user.php

@@ -31,14 +31,13 @@ if (!api_is_allowed_to_edit()) {
 }
 
 $tool_name = get_lang("SubscribeUserToCourse");
-if ($_REQUEST['type']=='teacher') {
+if (isset($_REQUEST['type']) && $_REQUEST['type']=='teacher') {
 	$tool_name = get_lang("SubscribeUserToCourseAsTeacher");
 }
 
-
 //extra entries in breadcrumb
 $interbreadcrumb[] = array ("url" => "user.php", "name" => get_lang("ToolUser"));
-if ($_GET['keyword']) {
+if (isset($_REQUEST['keyword']) && $_GET['keyword']) {
 	$interbreadcrumb[] = array ("url" => "subscribe_user.php?type=".Security::remove_XSS($_GET['type']), "name" => $tool_name);
 	$tool_name = get_lang('SearchResults');
 }

main/work/work_list.php

@@ -15,6 +15,7 @@ require_once 'work.lib.php';
 $this_section = SECTION_COURSES;
 
 $workId = isset($_GET['id']) ? intval($_GET['id']) : null;
+$origin = isset($origin) ? Security::remove_XSS($origin) : null;
 
 if (empty($workId)) {
     api_not_allowed(true);
@@ -62,9 +63,9 @@ $documentsAddedInWork = getAllDocumentsFromWorkToString($workId, $courseInfo);
 Display :: display_header(null);
 
 echo '<div class="actions">';
-echo '<a href="'.api_get_path(WEB_CODE_PATH).'work/work.php?'.api_get_cidreq().'&origin='.$origin.'&gradebook='.$gradebook.'">'.Display::return_icon('back.png', get_lang('BackToWorksList'),'',ICON_SIZE_MEDIUM).'</a>';
+echo '<a href="'.api_get_path(WEB_CODE_PATH).'work/work.php?'.api_get_cidreq().'&origin='.$origin.'">'.Display::return_icon('back.png', get_lang('BackToWorksList'),'',ICON_SIZE_MEDIUM).'</a>';
 if (api_is_allowed_to_session_edit(false, true) && !empty($workId)) {
-    echo '<a href="'.api_get_path(WEB_CODE_PATH).'work/upload.php?'.api_get_cidreq().'&id='.$workId.'&origin='.$origin.'&gradebook='.$gradebook.'">';
+    echo '<a href="'.api_get_path(WEB_CODE_PATH).'work/upload.php?'.api_get_cidreq().'&id='.$workId.'&origin='.$origin.'">';
     echo Display::return_icon('upload_file.png', get_lang('UploadADocument'), '', ICON_SIZE_MEDIUM).'</a>';
 }
 echo '</div>';