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

Answer 1

$a = array('red','green', 'blue','yellow');

$b = array_reverse( $a );

If your question is how to make the last become the first.