diff --git a/functions/dbSqlManager.php b/functions/dbSqlManager.php
index b618c67..96c011b 100644
--- a/functions/dbSqlManager.php
+++ b/functions/dbSqlManager.php
@@ -336,7 +336,8 @@ class dbSqlManager {
     private function parms($string,$data) {
         $indexed=$data==array_values($data);
         foreach($data as $k=>$v) {
-        if(is_string($v)) $v="'$v'";
+            if(is_string($v)) $v="'$v'";
+            elseif(is_null($v)) $v="NULL";
             if($indexed) $string=preg_replace('/\?/',$v,$string,1);
             else $string=str_replace(":$k",$v,$string);
         }
diff --git a/functions/functions.php b/functions/functions.php
index e10ec8d..8de8015 100644
--- a/functions/functions.php
+++ b/functions/functions.php
@@ -1421,7 +1421,7 @@ function getRequestTableDatas($table_structure, $force_default_values=false) {
 function buildSqlSearch($sql, $search, $partBuilderFct) {
     if($search && $search!="" && is_callable($partBuilderFct)) {
         $parts = explode(" ", $search);
-        if(is_array($parts) && count($parts>0)) {
+        if($parts && is_array($parts) && count($parts)>0) {
             $search_sql = "";
             foreach($parts as $p) {
                 if($p!="") $search_sql .= (($search_sql!="") ? " OR " : "").$partBuilderFct($p);