santa.php

<?php
/**
 * Secret Santa Generator - powered by PHP Generators for the lolz.
 */

$players = [
    "[email protected]",
    "[email protected]",
    "[email protected]",
    "[email protected]",
    "[email protected]",
    "[email protected]",
];

function giveMeABuddy($players) {
    // Make sure results are not predictable
    shuffle($players);

    foreach ($players as $key => $player) {
        // each player is the buddy of the last one
        $santa = $players[($key+1) % count($players)];

        yield $player => $santa;
    }
}

foreach (giveMeABuddy($players) as $player => $santa)
{
    printf("%s is the santa of %s\n", $santa, $player);
}