Php Yii2-从2.0.13更新

我使用

php composer.phar update

将Yii2从2.0.13版更新到最后的2.0.15.1版，文档中说：

您可以通过执行以下操作开始准备Yii 2.1的应用程序： 以下:

Replace ::className() calls with ::class (if you’re running PHP 5.5+).
Replace usages of yii\base\InvalidParamException with yii\base\InvalidArgumentException.
Replace calls to Yii::trace() with Yii::debug().
Remove calls to yii\BaseYii::powered().
If you are using XCache or Zend data cache, those are going away in 2.1 so you might want to start looking for an alternative.

像这样

public function behaviors()
    {
        return [
            'access' => [
                'class' => AccessControl::class,
                'rules' => [
                    [
                        //
                    ]
                ]
            ],
            'verbs' => [
                'class' => VerbFilter::class,
                'actions' => [
                    'delete' => ['POST'],
                ],
            ],
        ];
    }

但是PhpStorm说“类名常量仅在PHP5.5中可用 检查源代码中使用的语言功能是否与所选语言级别相对应。（即，traits只能在PHP5.4中使用）。”

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我的Php是7.2.11，怎么了？

您需要在设置->语言和框架->Php: