Fix issue - 2

Author: SOHELAHMED7

tests/unit/MultiDbFreshMigrationTest.php

@@ -175,7 +175,7 @@ public function testAfterKeyword()
         Yii::$app->set('db', Yii::$app->mysql);
         $this->assertInstanceOf(MySqlSchema::class, Yii::$app->db->schema);
 
-        $version = PHP_VERSION;
+        $version = Yii::$app->db->createCommand('SELECT VERSION();')->queryScalar();
         $dbSchema = Yii::$app->db->schema;
         $columnSchema = new ColumnSchema([
             'type' => 'integer',