edit

neo4jApi/app/controller/Cdss.php

@@ -396,7 +396,7 @@ class Cdss extends CommonTwoController
             }
         } else {
             foreach ($aboutDiseases as $key => $value) {
-                $aboutDiseases[$key]['keyword_count'] = substr_count($value['clinicalFeature'], $keyword);
+                $aboutDiseases[$key]['keyword_count'] = !empty($value['clinicalFeature']) && !empty($keyword) ? substr_count($value['clinicalFeature'], $keyword) : 0;
             }
         }