array_reduce()

array_reduce() — Iteratively reduce the array to a single value using a callback function.

array_reduce applies iteratively the callback function to the elements of the array, so as to reduce the array to a single value.

Inputs: array: The input array. carry: Holds the return value of the previous iteration; in the case of the first iteration it instead holds the value of initial. item: Holds the value of the current iteration. initial: If the optional initial is available, it will be used at the beginning of the process, or as a final result in case the array is empty.

Returns: Returns the resulting value. If the array is empty and initial is not passed, array_reduce returns null.