The expression return array(Yansongda\P...in\ParserPlugin::class) returns the type array<integer,string> which is incompatible with the return type mandated by Yansongda\Artful\Contrac...Interface::getPlugins() of Yansongda\Artful\Contract\PluginInterface[].
In the issue above, the returned value is violating the contract defined by the
mentioned interface.
Let's take a look at an example:
interfaceHasName{/** @return string */publicfunctiongetName();}className{public$name;}classUserimplementsHasName{/** @return string|Name */publicfunctiongetName(){returnnewName('foo');// This is a violation of the ``HasName`` interface// which only allows a string value to be returned.}}
In the issue above, the returned value is violating the contract defined by the mentioned interface.
Let's take a look at an example: