php - What's the most efficient way to array_pop() the last n elements in an array?

Question

What's an efficient way to pop the last n elements in an array?

Here's one:

$arr = range(1,10);
$n = 2;
$popped_array = array();
for ($i=0; $i < $n; $i++) { 
    $popped_array[] = array_pop($arr);
}
print_r($popped_array); // returns array(10,9);

Is there a more efficient way?

Answer 1

Use array_splice():

If you're trying to remove the last n elements, use the following function:

function array_pop_n(array $arr, $n) {
    return array_splice($arr, 0, -$n);
}

Demo

---

If you want to retrieve only the last n elements, then you can use the following function:

function array_pop_n(array $arr, $n) {
    array_splice($arr,0,-$n);
    return $arr;
}

Demo