php中的（bool）和（boolean）之间的区别？ [重复]

Question

This question already has an answer here:

• PHP: bool vs boolean type hinting 1 answer

What is the difference between:

$state = (bool)0;

and

$state = (boolean)0;

Both return the same value.

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Answer 1

Boolean is an alias for bool. Both of them mean that same type of variable.