Move Value in PHP Array to the Beginning of the Array

Question

I have a PHP array similar to this:

0 => "red",
1 => "green",
2 => "blue",
3 => "yellow"

I want to move yellow to index 0. How do I do this?

Edit: My question is how do I move any one of these elements to the beginning? How would I move green to index 0, or blue to index 0? This question is not exclusively about moving the last element to the beginning.

Answer 1

This seems like the simplest way to me. You can move any position to the beginning, not just the last (in this example it moves blue to the beginning).

$colours = array("red", "green", "blue", "yellow");

$movecolour = $colours[2];
unset($colours[2]);
array_unshift($colours, $movecolour);