How can array_pad() and array_map() be used to improve program flow and readability in PHP?

When dealing with arrays in PHP, sometimes it's necessary to pad arrays with certain values or apply a function to each element in the array. This can be achieved using array_pad() and array_map() functions, respectively. By utilizing these functions, you can improve program flow and readability by making the code more concise and easier to understand.

// Using array_pad() to pad an array with values
$originalArray = [1, 2, 3];
$paddedArray = array_pad($originalArray, 5, 0); // pads the array with 0 values to a length of 5

// Using array_map() to apply a function to each element in the array
$originalArray = [1, 2, 3];
$squaredArray = array_map(function($num) {
    return $num * $num;
}, $originalArray); // squares each element in the array