Are there any specific pitfalls to avoid when using array_rand with multidimensional arrays in PHP?

When using array_rand with multidimensional arrays in PHP, a common pitfall to avoid is that array_rand only works with one-dimensional arrays. To select a random element from a multidimensional array, you should first flatten the array using array_merge and then use array_rand on the flattened array.

// Flatten the multidimensional array
$flattenedArray = array_merge(...$multiDimensionalArray);

// Get a random key from the flattened array
$randomKey = array_rand($flattenedArray);

// Retrieve the random element from the flattened array
$randomElement = $flattenedArray[$randomKey];