yii尀base尀model：geterrors 怎么使用

getErrors()

public method

Returns the errors for all attribute or a single attribute.

See also:
getFirstErrors()
getFirstError()

array getErrors( $attribute = null )

$attribute
string

Attribute name. Use null to retrieve errors for all attributes.

return
array

Errors for all attributes or the specified attribute. Empty array is returned if no error.
Note that when returning errors for all attributes, the result is a two-dimensional array, like the following:
[
'username' => [
'Username is required.',
'Username must contain only word characters.',
],
'email' => [
'Email address is invalid.',
]
]