How is annotation useful in PHP?

Question

How is annotation useful in PHP? and I don\'t mean PHPDoc generically.

I just want a real-world example or something, I guess.

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So, according to @Max\'s

Answer 1

phpDocumentor and modern IDEs use annotations to determine method parameter types (@param), return values (@return) and so on.

PhpUnit Testing use annotation to group tests, define dependencies.