diff --git a/helper.php b/helper.php
index 5a01dbeb..a7ea8374 100644
--- a/helper.php
+++ b/helper.php
@@ -271,7 +271,7 @@ function S($name, $value = '', $options = null)
  */
 function trace($log = '[think]', $level = 'log')
 {
-    if ('[think]' == $log) {
+    if ('[think]' === $log) {
         return \think\Log::getLog();
     } else {
         \think\Log::record($log, $level);
diff --git a/library/think/Log.php b/library/think/Log.php
index 588d6bca..1fbf5d98 100644
--- a/library/think/Log.php
+++ b/library/think/Log.php
@@ -65,7 +65,7 @@ class Log
     public static function record($msg, $type = 'log')
     {
         if (!is_string($msg)) {
-            $msg = print_r($msg, true);
+            $msg = var_export($msg, true);
         }
         self::$log[] = ['type' => $type, 'msg' => $msg];
     }
@@ -88,7 +88,7 @@ class Log
     public static function write($msg, $type = 'log')
     {
         if (!is_string($msg)) {
-            $msg = print_r($msg, true);
+            $msg = var_export($msg, true);
         }
         // 封装日志信息
         $log[] = ['type' => $type, 'msg' => $msg];
diff --git a/library/think/log/driver/Trace.php b/library/think/log/driver/Trace.php
index 473fce9e..ebb2d2fc 100644
--- a/library/think/log/driver/Trace.php
+++ b/library/think/log/driver/Trace.php
@@ -15,7 +15,7 @@ namespace think\log\driver;
  */
 class Trace
 {
-    protected $tabs   = ['base' => '基本', 'file' => '文件', 'warn|error' => '错误', 'sql' => 'SQL', 'info|debug|log' => '调试'];
+    protected $tabs   = ['base' => '基本', 'file' => '文件', 'notic|error' => '错误', 'sql' => 'SQL', 'info|debug|log' => '调试'];
     protected $config = [
         'trace_file' => '',
     ];