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re: All the changes that come with PHP 7.4 VIEW POST

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re: Unfortunately, only contravariant arguments are supported so the command/handler example will not work: interface Command{} interface CommandHan...
 

I can't see the usefulness of contravariant VS covariant arguments. I guess there were some technical issues implementing covariant arguments.

I was hyped up with PHP 7.4 only for that!

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