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 react differently when we are in first or last iteration.

How to do this?

Answer 1

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

PHP 7.3 and newer:

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

PHP 7.2 and older:

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