From 9c675ceb6bb07226e5e0ff1533bb41050c76e228 Mon Sep 17 00:00:00 2001
From: liyuchun <563917701@qq.com>
Date: Wed, 15 Jun 2022 08:12:42 +0000
Subject: [PATCH]  * Fix error.

---
 module/search/model.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/module/search/model.php b/module/search/model.php
index 0d58ea642e..72e45f6dc9 100644
--- a/module/search/model.php
+++ b/module/search/model.php
@@ -115,7 +115,7 @@ class searchModel extends model
             /* Skip empty values. */
             if($this->post->$valueName == false) continue;
             if($this->post->$valueName == 'ZERO') $this->post->$valueName = 0;   // ZERO is special, stands to 0.
-            if(isset($fieldParams->$field) and $fieldParams->$field->control == 'select' and $this->post->$valueName == 'null') $this->post->$valueName = '';   // Null is special, stands to empty if control is select. Fix bug #3279.
+            if(isset($fieldParams->$field) and $fieldParams->$field->control == 'select' and $this->post->$valueName === 'null') $this->post->$valueName = '';   // Null is special, stands to empty if control is select. Fix bug #3279.
 
             $scoreNum += 1;