How to determine the first and last iteration in a foreach loop?

Question

The question is simple. I have a foreach loop in my code:

foreach($array as $element) {
    //code
}

In this loop, I want to r

Answer 1

If you prefer a solution that does not require the initialization of the counter outside the loop, I propose comparing the current iteration key against the function that tells you the last / first key of the array.

This becomes somewhat more efficient (and more readable) with the upcoming PHP 7.3.

Solution for PHP 7.3 and up:

foreach($array as $key => $element) {
    if ($key === array_key_first($array))
        echo 'FIRST ELEMENT!';

    if ($key === array_key_last($array))
        echo 'LAST ELEMENT!';
}

Solution for all PHP versions:

foreach($array as $key => $element) {
    reset($array);
    if ($key === key($array))
        echo 'FIRST ELEMENT!';

    end($array);
    if ($key === key($array))
        echo 'LAST ELEMENT!';
}