增加日志model

+<?php
+
+namespace common\models;
+
+use Yii;
+
+/**
+ * This is the model class for table "{{%log}}".
+ *
+ * @property integer $id
+ * @property string $content
+ * @property string $level
+ * @property integer $create_time
+ */
+class Log extends \yii\db\ActiveRecord
+{
+    /**
+     * @inheritdoc
+     */
+    public static function tableName()
+    {
+        return '{{%log}}';
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function rules()
+    {
+        return [
+            [['content'], 'string'],
+            [['create_time'], 'integer'],
+            [['level'], 'string', 'max' => 10],
+        ];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function attributeLabels()
+    {
+        return [
+            'id' => 'ID',
+            'content' => 'Content',
+            'level' => 'Level',
+            'create_time' => 'Create Time',
+        ];
+    }
+
+    public function write($msg,$level = 'info')
+    {
+        $content = is_array($msg) ? json_encode($msg) : $msg;
+        $this->setAttributes([
+            'content'=>$content,
+            'level'=>$level,
+            'create_time'=>time()
+        ]);
+        return $this->save();
+    }
+}