MDL-76362 core_file: Check prefix exists before checking length

2023-01-23 09:15:55 +08:00
parent 93ab932211
commit b0aa0b63e0
1 changed files with 2 additions and 2 deletions
@@ -100,8 +100,8 @@ abstract class file_info {
     */
    protected function build_search_files_sql($extensions, $prefix = null) {
        global $DB;
-        if (strlen($prefix ?? '')) {
-            $prefix = $prefix.'.';
+        if ($prefix && strlen($prefix)) {
+            $prefix = $prefix . '.';
        } else {
            $prefix = '';
        }