Fix PHP warning.

main/admin/group_list.php

@@ -110,7 +110,7 @@ function get_group_data($from, $number_of_items, $column, $direction) {
     foreach ($result as $row) {
         $groupRelations[$row['id']] = $row;
     }
-
+    $groups = array();
     while ($group = Database::fetch_row($res)) {
         $name = null;
         $id = $group[0];

main/admin/user_export.php

@@ -3,9 +3,6 @@
 /**
  *	@package chamilo.admin
  */
-/**
- * Code
- */
 
 $cidReset = true;
 
@@ -30,11 +27,12 @@ $courses[''] = '--';
 $sql = "SELECT code,visual_code,title FROM $course_table ORDER BY visual_code";
 
 global $_configuration;
-if ($_configuration['multiple_access_urls']) {
+if (api_is_multiple_url_enabled()) {
 	$tbl_course_rel_access_url= Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
 	$access_url_id = api_get_current_access_url_id();
 	if ($access_url_id != -1){
-	$sql = "SELECT code,visual_code,title FROM $course_table as c INNER JOIN $tbl_course_rel_access_url as course_rel_url
+	$sql = "SELECT code,visual_code,title FROM $course_table as c
+		INNER JOIN $tbl_course_rel_access_url as course_rel_url
 		ON (c.code = course_rel_url.course_code)
 		WHERE access_url_id = $access_url_id
 		ORDER BY visual_code";
@@ -77,7 +75,7 @@ if ($form->validate()) {
 		$filename = 'export_users_'.$course_code.'_'.date('Y-m-d_H-i-s');
 	} else {
 		global $_configuration;
-		if ($_configuration['multiple_access_urls']) {
+		if (api_is_multiple_url_enabled()) {
 			$tbl_user_rel_access_url= Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
 			$access_url_id = api_get_current_access_url_id();
 			if ($access_url_id != -1) {