How to map a function to each element of an array in PHP?

In PHP, you can use the array_map() function to map a function to each element of an array. Here is an example on how to do it:

// Example function to be mapped
function square($num) {
    return $num ** 2;
}

// Example array
$numbers = [1, 2, 3, 4, 5];

// Apply the square function to each element of the array
$squaredNumbers = array_map("square", $numbers);

// Output the result
print_r($squaredNumbers);

Output:

Array
(
    [0] => 1
    [1] => 4
    [2] => 9
    [3] => 16
    [4] => 25
)

In this example, the square() function is defined to square a number. The array_map() function is then used to apply the square() function to each element of the $numbers array. The resulting array of squared numbers is stored in the $squaredNumbers variable. Finally, the print_r() function is used to output the result.