Swap position of words in an array of 2-word elements

Question

We have array with names:

[
    'Robin Hood',
    'Little John',
    'Maid Marion',
    'Friar Tuck',
    'Will Scarlet'
]

First word inside each item should be moved to the end of this item.

We should get this:

[
    'Hood Robin',
    'John Little',
    'Marion Maid',
    'Tuck Friar',
    'Scarlet Will'
]

Answer 1

If you only need to move the part before the first whitespace (setting $limit = 2 in explode() to get two parts only):

function func($n) {
        list($first, $rest) = explode(' ', $n, 2);
        return $rest . ' ' . $first;
} 
$trans = array_map('func', $names);

(Demo)

Gives:

Array
(
    [0] => Hood Robin
    [1] => John Little
    [2] => Marion Maid
    [3] => Tuck Friar
    [4] => Scarlet Will
    [5] => Fitzgerald Kennedy John
)