Swap array values with php

Question

I have an array:

array(
    0 => \'contact\',
    1 => \'home\',
    2 => \'projects\'
);

and I need to swap the \'contact\' with

Answer 1

I wrote simple function array_swap: swap two elements between positions swap_a & swap_b.

function array_swap(&$array,$swap_a,$swap_b){
   list($array[$swap_a],$array[$swap_b]) = array($array[$swap_b],$array[$swap_a]);
}

For OP question (for example):

$items = array(
  0 => 'contact',
  1 => 'home',
  2 => 'projects'
);

array_swap($items,0,1);
var_dump($items);
// OUTPUT

array(3) {
   [0]=> string(4) "home"
   [1]=> string(7) "contact"
   [2]=> string(8) "projects"
 }

Update Since PHP 7.1 it's possible to do it like:

$items = [
  0 => 'contact',
  1 => 'home',
  2 => 'projects'
];

[$items[0], $items[1]] = [$items[1], $items[0]];

var_dump($items);
// OUTPUT

array(3) {
   [0]=> string(4) "home"
   [1]=> string(7) "contact"
   [2]=> string(8) "projects"
 }

It's possible through Symmetric array destructuring.