I use framework Yii2.
In the configuration, there is a rule for UrlManager:
.... 'components' => [ ... 'urlManager' => [ 'enablePrettyUrl' => true, 'showScriptName' => false, 'rules' => [ ... [ 'pattern' => '<some-param>/some-page', 'route' => 'some/route', 'defaults' => ['some-param' => 'default-value'] ], ... ] ], ... ] .... In the code, this route is used in many places: echo Html :: a ('Some page', ['some / route']);
But instead of forming a link with the default parameter: default-value / some-page, the wrong link is formed: some / route
Question: Why can defaults be written in the rules if they are not substituted when forming links?
According to the idea of defaults, the values for this and are needed, that if somewhere in the formation of the link the parameters are not specified, then it is necessary to set the default values.