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Comment by jonny383 | Hacker News Reader

Union types look somewhat handy, especially if you're using

    T|null

In PHP 7, you can still do

    function foo(string $bar = null): void

Which is a little clunky...

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In PHP 7 the correct code should be

    function foo(?string $bar): void

Having `= null` marks the parameter as optional with the default being `null`. Using `?string` means there is no default and you can pass in either a string or null.

Yes thanks. A little rusty on the old PHP knowledge off the top of my head.

I'd rather have overloaded function signatures, to be honest.

    function add(string $a, string$b){}
    function add(int $a, int $b){}

You should have '?' string

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