优化空值修改4

Application/Admin/Controller/PromoteCompanyController.class.php

@@ -326,6 +326,9 @@ class PromoteCompanyController extends ThinkController
             if(isset($save['company_belong']) && ($y_belong != $save['company_belong'])){
                 $is_change_belong = true;
             }
+            if(empty($save['contact_phone'])){
+                $save['contact_phone'] = NULL;
+            }
             $res = $model->save($save);
             if ($res) {
                 \Think\Log::actionLog('PromoteCompany/edit', 'partner', $res);