What is the use of is_array() function?

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Question:What is the use of is_array() function?

1.Function is used to print the array in readable format.

2.Adds elements to the beginning of the array and returns the size of array.

3.Function can be used to verify if a variable is an array. Returns TRUE or FALSE

4.Adds elements to the end of the array and returns the size of array.

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  1. What is the use of is_array() function?
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