What is [{ }] notation in php?

@dedrick 

In PHP, [{ }] notation allows you to create an array with one element, which is itself an empty array. It is a shorthand way of creating a nested array in one line.

For example:

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$arr = [{}];
print_r($arr);

This will output:

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Array
(
    [0] => Array
        (
        )
)