Checking if array is multidimensional or not?

Question

1. What is the most efficient way to check if an array is a flat array of primitive values or if it is a multidimensional array?

Answer 1

Try as follows

if (count($arrayList) != count($arrayList, COUNT_RECURSIVE)) 
{
  echo 'arrayList is multidimensional';

}else{

  echo 'arrayList is no multidimensional';
}