Can PHP functions or methods provide insights into the internal representation of arrays, and how can this knowledge be applied in practical programming scenarios?

PHP functions like `var_dump()` or `print_r()` can be used to provide insights into the internal representation of arrays, including their keys and values. This knowledge can be applied in practical programming scenarios for debugging purposes, understanding the structure of complex arrays, or ensuring data integrity.

$array = ['a' => 1, 'b' => 2, 'c' => 3];
var_dump($array);