How to use eval function in php?

The eval function in PHP is an inbuilt function that evaluates a string as PHP code.

How to use array_reduce() function in php?

array_reduce() Method: As the name suggests, an array_reduce() function reduces the array to a single value by performing the given operation. The array_reduce() applies the callback function to the elements of the array and gives output as a single value.

How to use array_walk() function in php?

array_walk() Method: It applies a user-defined function to every member of an array. The array’s keys and values are parameters in the function. The array_walk() function is not affected by the internal array pointer of the array.