Question

One dimensional array and multidimensional array

Answer 1

A one-dimensional array (or singledimension array) is a type of lineararray. Accessing its elements involves a single subscript which can either represent a row or column index. ... In the given example the array can contain 10 elements of any value available to the int type.
and
A multidimensional array is an arraycontaining one or more arrays. PHP understands multidimensional arrays that are two, three, four, five, or more levels deep. However, arrays more than three levels deep are hard to manage for most people.

Answer 2

One dimensional array:Accesing of element using only one subscription.

Two dimensional array:it is a array accessing of each element using two subscription.