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Warning: get_class() called without object from outside a class in /var/www/yii/framework/gii/generators/model/views/index.php on line 2

Fatal error: Uncaught Error: Class 'Yii' not found in /var/www/yii/framework/gii/generators/model/views/index.php:3 Stack trace: #0 {main} thrown in /var/www/yii/framework/gii/generators/model/views/index.php on line 3