Changes
                            
    Title
    unchanged
    How to customize the error message of a validation rule
    Category
    unchanged
    Tutorials
    Yii version
    unchanged
    
    Tags
    unchanged
    
    Content
    unchanged
    [...]
}
}
```
In the above, the customized error message contains a predefined placeholder `{attribute}`. The [CRequiredValidator] (whose alias is `required`) will replace this placeholder with the actual attribute name that fails the validation.