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What is Multidimensional array in PHP with Example?

Multidimensional Array is Arrays of Array means one arrays have multiple array. You can define as it have 2Dimensional ([][]), 3Dimensional ([][][]), 4Dimensional ([][][]), and etc.
ex:-

How to work:-
In this array first row or index or key any value necessary but second value not necessary to define. It can be created using nested array.

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