Learn

In the previous exercise, we learned how to add single array elements and to change array elements at a given index. PHP also provides us with built-in methods for removing array elements, and for adding many elements at once.

The array_pop() function takes an array as its argument. It removes the last element of an array and returns the removed element.

$my_array = ["tic", "tac", "toe"]; array_pop($my_array); // $my_array is now ["tic", "tac"] $popped = array_pop($my_array); // $popped is "tac" // $my_array is now ["tic"]

Note that array_pop() doesn’t just set the last element to NULL. It actually removes it from the array, meaning that array’s length will decrease by one (which we can verify using count()).

The array_push() function takes an array as its first argument. The arguments that follow are elements to be added to the end of the array. array_push() adds each of the elements to the array and returns the new number of elements in the array.

$new_array = ["eeny"]; $num_added = array_push($new_array, "meeny", "miny", "moe"); echo $num_added; // Prints: 4 echo implode(", ", $new_array); // Prints: eeny, meeny, miny, moe

Let’s practice!

Instructions

1.

We provided you an array $stack. Use the array_push() function to add two elements to the array: "blocker" and "impediment".

2.

Use the array_pop() function to remove all but one element from the array.

Take this course for free

Mini Info Outline Icon
By signing up for Codecademy, you agree to Codecademy's Terms of Service & Privacy Policy.

Or sign up using:

Already have an account?